// form validation
// 03/08/01 form action now in form HTML, not set here.

function emptyField(entry) { 	// test for an empty entry
	if (entry.length == 0) return true;
	for (i=0; i<entry.length; i++) {
		var ch = entry.charAt(i);
		if ( ch != " " && ch !="\t" ) {
			return false;
			}
		}
	return true;
}


function validEmail (entry) { //test for valid email field, at least x@y.z
	posOfAt=entry.indexOf('@');
	posOfDot=entry.lastIndexOf('.');

	if ( (posOfAt==-1) || (posOfDot== -1)) return false;
	if (posOfAt < 1 || (posOfDot < (posOfAt + 2)) ||  posOfDot+1 >= entry.length )  return false;
	return true; 
}

function ValidateForm() {

	var strErr="";
	with(document.forms[0]) {
		if ((emptyField(user.value)) || !(validEmail(user.value))) strErr ="Please enter a valid email address.\n\nClick OK to continue.";
		if (strErr != "") {
			alert(strErr);
			return false;
		}

		return true;
	}


}