常用的一些javascript小技巧（三）【方正平台】

//无模式的提示框
function modelessAlert(Msg)
{
  window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}
//访问剪贴板 (1)拖拽访问
event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL");
(2)普通访问

window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");  //操作COOKIE function SetCookie(sName, sValue)
{
document.cookie = sName + "=" + escape(sValue) + "; ";
}
function GetCookie(sName)
{
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{
 
  var aCrumb = aCookie[i].split("=");
  if (sName == aCrumb[0]) 
  return unescape(aCrumb[1]);
}
 
}
function DelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}
//自定义的apply,call
Function.prototype.apply = function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this; 
var argus = new Array();
for (var i=0;i<argu.length;i++)
  argus[i] = "argu[" + i + "]";
var r;
eval("r = " + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");")));
return r;
};
Function.prototype.call = function (obj) {
var argu = new Array();
for (var i=1;i<arguments.length;i++)
  argu[i-1] = arguments[i];
return this.apply(obj, argu);
};       
//下载文件
function DownURL(strRemoteURL,strLocalURL)
{
try
{
  var xmlHTTP=new ActiveXObject("Microsoft.XMLHTTP");
  xmlHTTP.open("Get",strRemoteURL,false);
  xmlHTTP.send();
  var adodbStream=new ActiveXObject("ADODB.Stream");
  adodbStream.Type=1;//1=adTypeBinary
  adodbStream.Open();
  adodbStream.write(xmlHTTP.responseBody);
  adodbStream.SaveToFile(strLocalURL,2);
  adodbStream.Close();
  adodbStream=null;
  xmlHTTP=null;
 
}
catch(e)
{
  window.confirm("下载URL出错!");
}
//window.confirm("下载完成.");
}
//检验连接是否有效
function getXML(URL) 
{
var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
xmlhttp.Open("GET",URL, false); 
try
{ 
  xmlhttp.Send();
}
catch(e){}
finally 
{
  var result = xmlhttp.responseText;
  if(result) 
  {
  if(xmlhttp.Status==200)
  {
    return(true);
  }
  else 
  {
    return(false);
  }
  }
  else 
  {
  return(false);
  }
}
}
//readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成
//组件是否安装
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))
//检查网页是否存在 function CheckURL(URL)
{
  var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  xmlhttp.Open("GET",URL, false);
  try
  { 
    xmlhttp.Send(); 
    var result = xmlhttp.status;
  }
  catch(e) {return(false); }
  if(result==200)
  { 
    return true;
  }
  xmlhttp = null;
  return false;
}  //设置光标位置 function getCaret(textbox)
{
var control = document.activeElement;
textbox.focus();
var rang = document.selection.createRange();
  rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus();
return rang.text.length;
}
function setCaret(textbox,pos)
{
try
{
  var r =textbox.createTextRange();
  r.moveStart('character',pos);
  r.collapse(true);
  r.select();
}
catch(e)
{}
}
function selectLength(textbox,start,len)
{
try
{
  var r =textbox.createTextRange();
 
  r.moveEnd('character',len-(textbox.value.length-start));
  r.moveStart('character',start);
 
  r.select();
}
catch(e)
{//alert(e.description)}
}
function insertAtCaret(textbox,text)
{
textbox.focus();
document.selection.createRange().text = text;
}