jquery form Validation

<! DOCTYPE HTML Public"-//W3C//DTD XHTML 1.0 transitional//en" "HTTP://WWW.W3.ORG/TR/XHTML1/DTD/XHTML1-TRANSITIONAL.DTD">"http://www.w3.org/1999/xhtml">"Content-type"Content="text/html; Charset=utf-8"/><title></title><style type="Text/css">Body {font:12px/19px Arial, Helvetica, Sans-serif; color:#666;} Form Div {margin:5px0;}.intLabel {float: Left; width:100px; text-align:right;}.intinput {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-repeat0Center; Padding-left:25px;}. onsuccess{background: #E9FBEB URL (../img/reg4.gif) no-repeat0Center; Padding-left:25px;}. high{color:red;}</style><!--The introduction of jquery--><script src=".. /scripts/jquery-1.3.1.js"Type="Text/javascript"></script><script type="Text/javascript">//<! [Cdata[$ (function () {//if it is required, add the Red Star logo.$("form:input.required"). each (function () {var$required = $ ("<strong class= ' High ' > *</strong>");//Creating Elements$( This). Parent (). append ($required);//and append it to the document.       }); //after the text box loses focus$('Form:input'). blur (function () {var$parent = $ ( This). parent (); $parent. Find (". Formtips"). Remove (); //Verify user name            if( $( This). is('#username') ){                   if( This. value==""|| This. value.length <6 ){                       varErrorMsg ='Please enter a user name of at least 6 digits.'; $parent. Append ('<span class= "Formtips onError" >'+errormsg+'</span>'); }Else{                       varOkmsg ='input is correct.'; $parent. Append ('<span class= "Formtips onsuccess" >'+okmsg+'</span>'); }            }            //Verifying Messages            if( $( This). is('#email') ){               if( This. value==""|| ( This. value!=""&&!/[email protected]+\. [A-za-z] {2,4}$/.test ( This. Value)) ){                     varErrorMsg ='Please enter the correct e-mail address.'; $parent. Append ('<span class= "Formtips onError" >'+errormsg+'</span>'); }Else{                     varOkmsg ='input is correct.'; $parent. Append ('<span class= "Formtips onsuccess" >'+okmsg+'</span>'); }}). KeyUp (function () {$ ( This). Triggerhandler ("Blur"); }). focus (function () {$ ( This). Triggerhandler ("Blur"); });//End Blur//submit, final verification. $('#send'). Click (function () {$ ("form:input.required"). Trigger ('Blur'); varNumerror = $ ('form. OnError'). length; if(numerror) {return false; } alert ("registration is successful, the password has been sent to your mailbox, please check.");       }); // Reset$('#res'). Click (function () {$ (". Formtips"). Remove (); });})//]]></script>"Post"action=""> <divclass="int"> <label for="username"> User name:</label> <input type="text"Id="username" class="Required"/> </div> <divclass="int"> <label for="Email"> Email:</label> <input type="text"Id="Email" class="Required"/> </div> <divclass="int"> <label for="Personinfo"> Personal Information:</label> <input type="text"Id="Personinfo"/> </div> <divclass="Sub"> <input type="Submit"Value="Submit"Id="Send"/><input type="Reset"Id="Res"/> </div></form></body>
jquery form Validation