var testresults;
function checkEmail(f){
	email=f.email.value;
	var str=email;
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (filter.test(str)){
		testresults=true;
		}else{
		alert("Please supply a valid email address.");
		return false;
		}
}