String.prototype.trim = function() {
	a = this.replace(/^\s+/, '');
	return a.replace(/\s+$/, '');
};

function validate_required(field,alerttxt) {
	with (field) {
		if (value==null||value.trim()=="") {
			alert(alerttxt);
			return false;
		} else {
			return true;
		}
	}
}

function validate_email(field,alerttxt) {
	with (field) {
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) {
			alert(alerttxt);
			return false;
		} else {
			return true;
		}
	}
}

var pcUsers = document.getElementById('pcUsers');

function validate_form(thisform) {
	with (thisform) {
		if (validate_required(first_name,"First Name must be filled out!")==false) {first_name.focus(); return false;}
		if (validate_required(last_name,"Last Name must be filled out!")==false) {last_name.focus(); return false;}
		if (validate_required(phone,"Phone Number must be filled out!")==false) {phone.focus(); return false;}
		if (validate_required(email,"Email must be filled out!")==false) {email.focus(); return false;}
		if (validate_email(email,"Not a valid e-mail address!")==false) {email.focus(); return false;}
		if (validate_required(company,"Company must be selected!")==false) {company.focus(); return false;}
		if (validate_required(pcUsers,"Number of Users must be selected!")==false) {pcUsers.focus(); return false;}
	}
}