实现代码如下：
function validator(obj,option){//验证对象
var self = this;
if(!(self instanceof validator))
return new validator(obj,option);
self.source={'mobile':'^(13|14|15|18)[0-9]{9}$','postcode':'^\\d{6}$','integer':'^-?\\d*$','email':'^\\w+((-\\w+)|(\\.\\w+))*\\@[A-Za-z0-9]+((\\.|-)[A-Za-z0-9]+)*\\.[A-Za-z0-9]+$','url':'^http[s]?:\\/\\/([\\w-]+\\.)+[\\w-]+([\\w-./?%&=]*)?$'};
for(var i in self.source){
if(i==option.type)
self.type=self.source[i];
}
self.tag=2;
self.input=obj;
self.options=option;
self.tip=document.getElementById(self.options.tips);
self.text=self.tip.innerHTML;
self.init(obj);
}
validator.prototype.init=function(o){
var self=this;
addEvent(o,'focus',function(){
self.focus();
});
addEvent(o,'blur',function(){
self.valid();
});
}
validator.prototype.valid=function(){
var self=this;
var reg=self.options.reg||self.type;
if(new RegExp(reg).test(self.input.value.replace(/\s/ig,''))){
self.tip.className='validator_oncorrect';
self.tip.innerHTML='输入正确';
self.tag=1;
}else{
self.tip.className='validator_onerror';
self.tip.innerHTML='对不起，您输入的内容不符合规则！';
self.tag=0;
}
}
validator.prototype.focus=function(){
this.tip.className='validator_onfocus';
this.tip.innerHTML=this.text;
}
function addEvent(el,type,fn){ //绑定事件
if(el.attachEvent) {
el['e'+type+fn] = fn; //IE下拷贝元素引用,使this指向el对象而不是window
el[type+fn] = function(){el['e'+type+fn](window.event);}
el.attachEvent('on'+type, el[type+fn]);
}else
el.addEventListener(type, fn, false);
}
//页面调用方法
var inputs=document.getElementsByTagName('input');//这里的写法感觉怪怪的，不够优雅，暂时也没找到优化的办法
var arr=[];
arr[0]=validator(inputs[0],{type:'postcode',tips:'m1'});
arr[1]=validator(inputs[1],{type:'url',tips:'m2'});
arr[2]=validator(inputs[2],{type:'email',tips:'m3'});
arr[3]=validator(inputs[3],{type:'mobile',tips:'m4'});
arr[4]=validator(inputs[4],{type:'integer',tips:'m5',reg:'^-?\\d*$'});
function submitForm(){//提交表单过滤
var l=arr.length;
for(var i in arr){
if(arr[i].tag==1)
l--;
else if(arr[i].tag==2){
arr[i].valid();
}
}
if(l!=0)return false;
}
以下是页面demo，可能缺少一个小图标，汗，不知道怎么发可执行的代码。
实现代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<meta name="copyright" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<title>验证控件</title>
<style>
body {padding:0; margin:0; font: 12px/1.5 Tahoma, Helvetica, Arial, sans-serif;}
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote,dl, dt, dd, ul, ol, li,pre,form, fieldset, legend, button, input, textarea,th, td {margin: 0;padding: 0;}
button, input, select, textarea {font: 12px/1.5 tahoma, arial, simsun, sans-serif;}
h1, h2, h3, h4, h5, h6 { font-size: 100%;font-weight:normal; }
address, cite, dfn, em, var { font-style: normal; }
code, kbd, pre, samp { font-family: courier new, courier, monospace; }
small { font-size: 12px; }
ul, ol { list-style: none; }
sup { vertical-align: text-top; }
sub { vertical-align: text-bottom; }
legend { color: #000; }
fieldset, img { border: 0; }
button, input, select, textarea { font-size: 100%; }
table { border-collapse: collapse; border-spacing: 0; }
.clear {clear:both;}
html { overflow:-moz-bars-vertical; }
a { text-decoration: none;}
a:hover { text-decoration: underline;}
.tabs_panel{margin:10px 0 0 20px;}
.wrap {clear:left;}
.left {height:25px;line-height:25px;width:160px;}
.center {height:auto;padding:3px;width:230px;}
.right {height:auto;width:350px;}
.left, .center, .right {float:left;margin:4px;}
input.txt {border:1px solid #CCCCCC;font-size:14px;height:20px;line-height:20px;width:188px;}
.validator_onshow {background:url("../images/validator.gif") no-repeat scroll 4px 4px transparent;border:1px solid #3196C4;color:#666666;line-height:20px;padding-left:25px;}
.validator_onerror {background:url("../images/validator.gif") no-repeat scroll 4px -596px #FFF2E9;border:1px solid #FF6600;color:#666666;line-height:20px;padding-left:25px;}
.validator_oncorrect {background:url("../images/validator.gif") no-repeat scroll 4px -396px #FFFFFF;border:1px solid #3196C4;font-size:12px;line-height:20px;padding-left:25px;}
.validator_onfocus {background:url("../images/validator.gif") no-repeat scroll 4px -196px #E2F3FF;border:1px solid #3196C4;color:#666666;line-height:20px;padding-left:25px;}
</style>
</head>
<body>
<h1>验证控件</h1>
<div id="example" class="tabs_panel">
<form method="post">
<div class="wrap">
<div class="left">邮编：</div>
<div class="center"><input type="text" name="validator" class="txt" /></div>
<div class="right"><div id="m1" class="validator_onshow">邮政编码只能为6位数字，有助于更快邮寄或快递。</div></div>
</div>
<div class="wrap">
<div class="left">网址：</div>
<div class="center"><input type="text" name="validator" class="txt" /></div>
<div class="right"><div id="m2" class="validator_onshow">请正确输入url地址</div></div>
</div>
<div class="wrap">
<div class="left">邮箱：</div>
<div class="center"><input type="text" name="validator" class="txt" /></div>
<div class="right"><div id="m3" class="validator_onshow">请输入正确的E-mail格式，并带有@符号，不区分大小写。</div></div>
</div>
<div class="wrap">
<div class="left">手机：</div>
<div class="center"><input type="text" name="validator" class="txt" /></div>
<div class="right"><div id="m4" class="validator_onshow">手机号码只能为11位数字。</div></div>
</div>
<div class="wrap">
<div class="left">整数：</div>
<div class="center"><input type="text" name="validator" class="txt"/></div>
<div class="right"><div id="m5" class="validator_onshow">请正确输入整数</div></div>
</div>
<div class="clear"></div>
<input type="submit" value="保存" onclick="return submitForm()"/>
</form>
</div>
</body>
<script type="text/javascript" src="style/js/validator.js"></script>
</html>
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