简单的表单验证
1.html code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<script src="http://www.cnblogs.com/scripts/jquery-1.3.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
//增加红星标识
$("form :input.required").each(function(){
$(this).parent().append("<strong class='high'>*</strong>");
});
$("form :input").blur(function(){
var j_parent = $(this).parent();
j_parent.find(".formtips").remove();
var message = "";
if($(this).is("#username")){
if(this.value==""|| this.value.length < 6){
message ="请输入至少六位的用户名！";
j_parent.append("<span class='formtips onError'>"+message+"</span>");
}else{
message ="输入正确！";
j_parent.append("<span class='formtips onSuccess'>"+message+"</span>");
}
}
//邮件验证
if($(this).is("#email")){
if( this.value==""||( this.value!="" && ) ) ){
message = '请输入正确的E-Mail地址！';
j_parent.append('<span class="formtips onError">'+message+'</span>');
}else{
message = '输入正确！';
j_parent.append('<span class="formtips onSuccess">'+message+'</span>');
}
}
//相应键盘按键弹起事件
}).keyup(function(){
$(this).triggerHandler("blur");
//得到焦点事件
}).focus(function(){
$(this).triggerHandler("blur");
});
$("#send").click(function(){
$("form .required:input").trigger("blur");
var numError = $("form .onError").length;
if(numError > 0){
return false;
}
alert("数据已发送！");
});
});
</script>
</head>
<body>
<form method="post" action="">
<div class="int">
<label for="username">用户名:</label>
<input type="text" id="username" class="required" />
</div>
<div class="int">
<label for="email">邮箱:</label>
<input type="text" id="email" class="required" />
</div>
<div class="int">
<label for="personinfo">个人资料:</label>
<input type="text" id="personinfo" />
</div>
<div class="sub">
<input type="submit" value="提交" id="send"/><input type="reset" id="res"/>
</div>
</form>
</body>
</html>
2.css code
body { font:12px/19px Arial, Helvetica, sans-serif; color:#666;}
form div { margin:5px 0;}
.int label { float:left; width:100px; text-align:right;}
.int input { padding:1px 1px; border:1px solid #ccc;height:16px;}
.sub { padding-left:100px;}
.sub input { margin-right:10px; }
.formtips{width: 200px;margin:2px;padding:2px;}
.onError{
background:#FFE0E9 url(../img/reg3.gif) no-repeat 0 center;
padding-left:25px;
}
.onSuccess{
background:#E9FBEB url(../img/reg4.gif) no-repeat 0 center;
padding-left:25px;
}
.high{
color:red;
}
3.image
4.效果
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