function checkEmail() {
	//alert("checkEmail");
	var re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	var myemail=document.getElementById("email").value;
	//alert("Email: "+myemail);
	// test email format
	myreturn = true; 
	if(!re.test(myemail) || (myemail == "")){ 
			document.getElementById("alert_msg").innerHTML = "Please enter a valid email address.";
			document.getElementById("email").style.border = "2px solid #FF0000";
			//alert("false");
			myreturn = false;
		} else {
			document.getElementById("alert_msg").innerHTML = "";
			//document.getElementById("email").style.border = "#000000";
			
			//alert("true");
			myreturn = true;
	} // end re. test
	return myreturn;
}