密码强度检测函数（正则）

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>OA登录</title> <style type="text/css">  </style> <SCRIPT> function showImage(){ var imgObj=new Image(); //创建一个Image对象 imgObj.src="http://www.beingmate.com/images/banner_chang_add.gif"; //装载Image源 if(typeof(imgObj)=="object"){ //判断imgObj装载过后是否为对象，防止异常操作 var width=0; var height=0; width=imgObj.width+20; //+20是因为IE方式的默认边距 height=imgObj.height+20; if(width!=0&&height!=0){ window.open(imgObj.src,"Imagehow", "toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=" +( width )+ ",height=" +( height)); }else{ setTimeout("showImage()", 100); // 判断图片是否装载完成，只有在装载完成后才能取到宽高值 } }else{ alert("系统错误"); } } //showImage(); </SCRIPT> <script type="text/javascript"> //From BBS.51JS.COM By 网络东西 var $ = function(v){return document.getElementById(v);} function isSecurity(v){  if (v.length < 3) { iss.reset();return;}  var lv = -1;  if (v.match(/[a-z]/ig)){lv++;}  if (v.match(/[0-9]/ig)){lv++;}  if (v.match(/(.[^a-z0-9])/ig)){lv++;}  if (v.length < 6 && lv > 0){lv--;}  iss.reset();  switch(lv) {   case 0:  iss.level0();  break;  case 1:  iss.level1();  break;  case 2:  iss.level2();  break;  default:  iss.reset();  } } var iss = {  color:["CC0000","FFCC33","66CC00","CCCCCC"],  text:["弱","中","强"],  width:["50","100","150","10"],  reset:function(){  $("B").style.backgroundColor = iss.color[3];  $("B").style.width = iss.width[3];  $("A").innerHTML = "";  },  level0:function(){  $("B").style.backgroundColor = iss.color[0];  $("B").style.width = iss.width[0];  $("A").innerHTML = "密码较弱";   },  level1:function(){  $("B").style.backgroundColor = iss.color[1];  $("B").style.width = iss.width[1];  $("A").innerHTML = "中";   },  level2:function(){  $("B").style.backgroundColor = iss.color[2];  $("B").style.width = iss.width[2];  $("A").innerHTML = "高强";  } } </script> <style type="text/css">  </style> </head> <body background="BG.gif" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0"> <table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0">   <tr>      <td align="center">        <table width="500" border="0" cellpadding="0" cellspacing="2" bgcolor="#427CD5">         <tr>           <td><table width="600" height="350" border="0" cellpadding="0" cellspacing="1" bgcolor="#FFFFFF">               <tr>                  <td valign="top" background="bg.jpg"><table width="100%" border="0" cellspacing="0" cellpadding="0">                     <tr>                        <td width="13%" height="126">&nbsp;</td>                       <td width="87%">&nbsp;</td>                     </tr>                     <tr>                        <td>&nbsp;</td>                       <td align="right"><div align="left"> <span class="font14"><a href="http://www.beingmate.com/user_login/" target="_blank"><font color="#FF3300">贝因美冠军宝贝大赛专用信息平台入口</font></a></span>                            <p align="center"><font color=#ff0000>用户名或密码错误，请重新输入。</font></p> <form name="loginform" method="post" action="Main.asp" target="_parent">   <div align="left"></div>   <table border=0 width="55%" cellspacing=1 cellpadding=3>     <tr>        <td width="25%" align=right>帐号/编号:</td>       <td width="25%"><input name=LoginName type=text size=10 maxlength=20 class="doc_txt" value=""></td>       <td align=right>密码: <input name="Pwd" type="Password" size=10 maxlength=20 class="doc_txt" value="" onkeyup="isSecurity(this.value);"></td>     </tr>     <tr>        <td height="50" colspan="3" align=right><div align="center">         <table width="100%" border="0" cellspacing="0" cellpadding="0">           <tr>             <td width="36%" align="right"><font class="red" id="A">密码强度检测</font>&nbsp;</td>             <td width="64%" valign="top"> <table height="8" border="1" align="left" cellpadding="0" cellspacing="0" bordercolor="#EEEEEE" style="border-collapse:collapse;"> <tr>  <td bgcolor="#EEEEEE" width="1" align="center" valign="middle" id="B"></td> </tr> </table></td>           </tr>         </table>                 <table width="180" border="0" cellspacing="0" cellpadding="0">         <tr>            <td width="83" align="right"><label>             <input type="submit" name="Submit" value=" 登 陆 " onclick="return CheckData();"/>           </label>             &nbsp; 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密码强度检测函数（正则）

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