function stop() {
	if (!document.forms[0]) { return; }
	var contact_name = document.forms[0]['contact_name'];
	if (contact_name.value == '') {
		alert('Please enter a contact name');
		contact_name.focus();
		return false;
	}
	var company = document.forms[0]['company'];
	if (company.value == '') {
		alert('Please enter a company name');
		company.focus();
		return false;
	}
	var numPattern = /\d/;
	var telephone = document.forms[0]['telephone'];
	if (!numPattern.test(telephone.value)) {
		alert ('Please enter a vaild phone number');
		return false;
	}
	var email = document.forms[0]['email'];
	if (email.value.indexOf('@') == -1) {
		alert('Please enter a valid email address');
		email.focus();
		return false;
	}
	var title = document.forms[0]['title'];
	if (title.value == '') {
		alert('Please enter a title');
		title.focus();
		return false;
	}
	var file = document.forms[0]['fileatt'];
	var patternpdf = /\.pdf/;
	var patterndoc = /\.doc/;
	if (!patternpdf.test(file.value) && !patterndoc.test(file.value)) {
		alert("Please choose a file in \n a valid format (pdf, or doc)");
		file.focus();
		return false;
	} 
	return;
} // end