function  IsEmpty() 
{
	  if (document.form1.txtemail.value=="")
	{
	
	document.form1.txtemail.focus();
	alert("Enter Email Address");
      	return false;
   	}
   	
   	else if(document.form1.txtemail.value!="")
   	{
   	     
    	
   		if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.form1.txtemail.value)){
return (true)
}
else
{
alert("Your E-mail Address is Invalid! Please re-enter.")
document.form1.txtemail.focus();
return (false)
}
}

    
}