<!-- bookmark this page // -->


function reg1()
{
	var ex1 = document.f1.NAME.value;
	var ex2 = document.f1.mailfrom.value;
	var ex3 = ex2.indexOf("@");
	var ex4 = ex2.indexOf(".");

	if ( ex1 == "" || ex2 == "") alert ("Please enter your name and email address");
	else

	if ( ex2.length < 7 || ex3 == -1 || ex4 == -1) alert ("Invalid email address, please re-enter");

	else
	document.f1.submit();
}
<!-- end form 1 submit with email validation // -->