// JavaScript Document
function validateEmail(src) {  
        emailReg = "^[\\w-_\.]*[\\w-_\.]\@[\\w]\.+[\\w]+[a-zA-Z]$"  
          var regex = new RegExp(emailReg);  
          if(regex.test(src) == false){  
               alert('Please enter a valid email address and try again!');  
               document.frmEmailList.txtEmail.value = ""  
               document.frmEmailList.txtEmail.focus();  
               return false;  
          }  
          return regex.test(src);  
}