// JavaScript Document
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("Please enter a valid email address.")
		e.value = "";
		//e.select()		
	}
	return returnval
}