JavaScript Validation for Email Id [duplicate]

Question

Duplicate :

Validate email address in JavaScript?

I want to validate emailid using JavaScript. I am using following code:

var emailPat = /^(\".*\"|[A-Za-z]\w*)@(\[\d{1,3}(\.\d{1,3}){3}]|[A-Za-z]\w*(\.[A-Za-z]\w*)+)$/ ;
var emailid=document.getElementById("<%=txtEmail.ClientID %>").value; 
var matchArray = emailid.match(emailPat);
if (txtemail.value!="")
{  
  if (matchArray == null)
  {
        alert("Your email address seems to be incorrect. \n Please type the proper email address and try again.") 
        return false
  }
}

This code is working for emails like, [email protected]

But when i enter valid mailid like [email protected] or [email protected], it is showing alert. What changes should I do in my coding, so it will not show alert for valid mail ids like above? Can anyone give me suggestions?

Answer 1

Nice info with many examples:

http://www.regular-expressions.info/email.html

btw: + is valid character, I hate validators where I can't enter [email protected] (because gmail supports this)