function check() {	
	if(document.form.email.value == "") {
		alert("Please enter your email.");		
		document.form.email.select();	
		return false;
	}
		
	else {
		var myEmail = document.form.email.value;
		var myEMailIsValid = true;
		var symbolAt = myEmail.indexOf('@');
		var lastDotAt = myEmail.lastIndexOf('.');
		var mySpaceAt = myEmail.indexOf(' ');
		var myLength = myEmail.length;
			
		if (symbolAt < 1 ) {
			myEMailIsValid = false;
		}

		if (lastDotAt < symbolAt) {
			myEMailIsValid = false;
		}

		if (myLength - lastDotAt <= 2) {
			myEMailIsValid = false;
		}

		if (mySpaceAt != -1) {
			myEMailIsValid = false;
		}

		if (myEMailIsValid != true) {
			alert("email is NOT valid!");
			document.form.email.select();
		}
				
		return myEMailIsValid
	}
}

function checkEmail( email ) 
{	
	if(email == "") return false;
	
	var myEmail = Trim(email);
	var symbolAt = myEmail.indexOf('@');
	var lastDotAt = myEmail.lastIndexOf('.');
	var mySpaceAt = myEmail.indexOf(' ');
	var myLength = myEmail.length;
		
	if (symbolAt < 1 )	return false;
	if (lastDotAt < symbolAt)	return false;
	if (myLength - lastDotAt <= 2) return false;
	if (mySpaceAt != -1) return false;

	return true
}