// JavaScript Document
function checkform() 
{ 
 
 document.form1.txtEmail.value=document.form1.txtEmail.value.replace(/^\s*|\s*$/g,"");
      if (document.form1.txtEmail.value=="")
     {
	 alert("Enter Email :"); 
     return false;
	 } 
	 else
	 {
	 return true;
	 }
}


function validate(form_id,email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert('Invalid Email Address');
      return false;
   }
}