var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i

function checkmail(e)
{
	var returnval=emailfilter.test(e.value)
	if (returnval==false){
		alert("The email address entered is not formatted correctly.\nPlease enter a valid email address.")
		e.focus();
	}
	return returnval
}