来个实时更新文本框关于某个项的值

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head id="Head1">
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<title>
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</title>
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<base target="_self" />
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function $(id)
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{
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return document.getElementById(id);
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}
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String.prototype.trim = function()
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{
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var reExtraSpace = /^\s+(.*?)\s+$/;
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return this.replace(reExtraSpace, "$1");
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}
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function AddMoney(objDropDownList,sTextBoxID,sMoney)
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{
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var objSel = objDropDownList;
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var objTxt = $(sTextBoxID);
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var sNewAmount = objSel.options[objSel.selectedIndex].text;
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var sMoney = sMoney + "元"; //e.g. 50元
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var strNewValue = sNewAmount + "张";
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// if (sNewAmount.trim() == "")
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// return;
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objTxt.value = sNewAmount;
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var oMemo = $("txtMemo");
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var rePatten = /(\d+\S+元)/;
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var strSource = oMemo.value;
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if (rePatten.test(strSource))
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{
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var strTmpSource = RegExp.$1;
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var strFind = sMoney;
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var arrSource = strTmpSource.split(",");
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var arrLen = arrSource.length;
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var IsExistsValue = false;
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for (var i = 0;i < arrLen;i++)
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{
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var sTmpSource = arrSource[i];
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//alert(sTmpSource);
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var iTmpIndex = sTmpSource.indexOf(strFind);
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if (iTmpIndex > -1)
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{
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if (sNewAmount == "")
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{
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arrSource[i] = null;
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}
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else
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arrSource[i] = sTmpSource.replace(sTmpSource.substring(0,iTmpIndex),strNewValue);
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IsExistsValue = true;
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break;
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}
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}
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var arrResult = [];
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var j = 0;
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/*解决当数据删除时留下“,”的问题*/
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for (var i = 0;i < arrSource.length; i++)
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{
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if (arrSource[i] == null || arrSource[i] == "")
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continue;
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arrResult[j] = arrSource[i];
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j ++;
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}
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arrSource = arrResult;
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if (! IsExistsValue)
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{
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arrSource[arrLen] = strNewValue + sMoney;
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}
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// alert(strSource + " ," + arrSource);
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strSource = strSource.replace(rePatten,arrSource);
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oMemo.value = strSource;
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}
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else
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{
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if (oMemo.value.trim() == "")
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oMemo.value = strNewValue + sMoney;
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else
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oMemo.value += "\r\n" + strNewValue + sMoney;
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}
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}
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function IsEqualMoney()
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{
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var oMoney = $("txtChangeAmount");
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var oMemo = $("txtMemo");
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var iAmount = parseInt(oMoney.value);
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var reMoneyPatten = "元";
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var reAmountPatten = "张";
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var iTotalAmount = 0;
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var rePatten = /(\d+\S+元)/;
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var strSource = oMemo.value;
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if (rePatten.test(strSource))
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{
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var strTmpSource = RegExp.$1;
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var arrSource = strTmpSource.split(",");
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var arrLen = arrSource.length;
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for (var i = 0;i < arrLen; i++)
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{
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var sTmp = arrSource[i];
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var iTmpIndex = sTmp.indexOf(reAmountPatten);
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if (iTmpIndex > -1)
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{
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var iTmpCount = sTmp.substring(0,iTmpIndex);
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iTmpCount = parseInt(iTmpCount);
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var iTmpAmount = sTmp.substring(iTmpIndex + 1,sTmp.length - 1);
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iTmpAmount = parseInt(iTmpAmount);
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var iTmpResult = 0;
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iTmpResult = iTmpAmount * iTmpCount;
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//alert(iTmpCount + " 张 " + iTmpAmount + " " + iTmpResult);
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iTotalAmount += iTmpResult;
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}
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}
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}
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if (iTotalAmount != iAmount)
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{
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alert("请确认兑换金额一致：兑换金额：" + iAmount + "\r\n而备注中的金额为：" + iTotalAmount);
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oMoney.focus();
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oMoney.select();
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return false;
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}
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return true;
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}
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function CheckData()
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{
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var oMoney = $("txtChangeAmount");
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var oMemo = $("txtMemo");
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if (!IsEqualMoney())
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{
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return false;
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}
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return true;
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}
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</script>
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.style1 {
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text-align: center;
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}
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</style>
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</head>
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<base target="_self" />
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<body scroll="no">
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<form name="form1" method="post" action="#" id="form1">
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<table align="center" border="1" cellpadding="0" cellspacing="0" width="100%" id="infotable">
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<tr align="right">
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<td>
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兑换金额</td>
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<td align="left">
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<input name="txtChangeAmount" type="text" id="txtChangeAmount" style="border-style:Groove;width:172px;" /></td>
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<tr>
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<td colspan="2" height="70px" valign="middle">
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td align="right" style="width: 7%">
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50元 </td>
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<td align="left" width="10%">
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<input name="txtFifty" type="text" id="txtFifty" style="border-style:Groove;width:30px;" /><select name="ddlFifty" id="ddlFifty" onchange="AddMoney(this,'txtFifty','50')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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<td width="5%" align="right">
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20元 </td>
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<td align="left" width="10%">
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<input name="txtTwenty" type="text" id="txtTwenty" style="border-style:Groove;width:30px;" /><select name="ddlTwenty" id="ddlTwenty" onchange="AddMoney(this,'txtTwenty','20')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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<td width="5%" align="right">
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10元 </td>
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<td align="left" width="10%">
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<input name="txtTen" type="text" id="txtTen" style="border-style:Groove;width:30px;" /><select name="ddlTen" id="ddlTen" onchange="AddMoney(this,'txtTen','10')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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</tr>
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<tr>
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<td style="width: 7%" class="style1">
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5元 </td>
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<td align="left" width="10%">
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<input name="txtFive" type="text" id="txtFive" style="border-style:Groove;width:30px;" /><select name="ddlFive" id="ddlFive" onchange="AddMoney(this,'txtFive','5')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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<td align="right" width="5%">
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2元 </td>
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<td align="left" width="10%">
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<input name="txtTwo" type="text" id="txtTwo" style="border-style:Groove;width:30px;" /><select name="ddlTwo" id="ddlTwo" onchange="AddMoney(this,'txtTwo','2')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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<td width="5%" align="right">
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1元 </td>
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<td align="left" width="10%">
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<input name="txtOne" type="text" id="txtOne" style="border-style:Groove;width:30px;" /><select name="ddlOne" id="ddlOne" onchange="AddMoney(this,'txtOne','1')" style="width:20px;">
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<option value=""></option>
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<option value="1">1</option>
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<option value="2">2</option>
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<option value="3">3</option>
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<option value="4">4</option>
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<option value="5">5</option>
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<option value="6">6</option>
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<option value="7">7</option>
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<option value="8">8</option>
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<option value="9">9</option>
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<option value="10">10</option>
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</select>张</td>
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</tr>
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</table>
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</td>
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</tr>
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<tr>
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<td align="right">
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备注信息</td>
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<td align="left">
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<textarea name="txtMemo" rows="2" cols="20" id="txtMemo" style="border-style:Groove;height:130px;width:462px;"></textarea></td>
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</tr>
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<tr>
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<td colspan="2" style="text-align: center">
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<table border="0" cellpadding="3" cellspacing="0" width="500">
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<tr>
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<td width="20%" style="height: 20px">
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 </td>
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<td width="20%" style="height: 20px">
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 </td>
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<td width="20%" style="height: 20px">
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<input type="button" name="imgBtnSave" id="imgBtnSave" value="确定" onclick="return CheckData();" style="border-width:0px;" /></td>
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<td width="20%" style="height: 20px">
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</td>
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<td width="20%" style="height: 20px">
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 </td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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</form>
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</body>
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</html>
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posted @ 2007-12-10 17:44 Sam Lin 阅读(388) 评论(0) 收藏举报

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来个实时更新文本框关于某个项的值

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