/*
Submit Once form validation- 
© Dynamic Drive (www.dynamicdrive.com)

the following functions cover verification for log in forms
verification for e-mail forms is covered in formverify_b.js
*/



function submitonce(f){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
//screen thru every element in the form, and hunt down "submit" and "reset"
for (var i=0;i<f.length;i++){
var tempobj=f.elements[i];
if(tempobj.type.toLowerCase()=="submit" || tempobj.type.toLowerCase()=="reset") {
//disable em
	tempobj.disabled=true;
}
}
}
}



function validEmail(e) {
	
e = e.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
	
var invalidChars = " /:,;";

if (e === "")  {// cannot be empty
	return false;
}
var badChar;

for (var i=0; i<invalidChars.length; i++) {	// does it contain any invalid characters?
badChar = invalidChars.charAt(i);
if (e.indexOf(badChar,0) > -1) {
	return false;
}
}

var atPos = e.indexOf("@",1); // there must be one "@" symbol
if (atPos == -1) {
	return false;
}

if (e.indexOf("@",atPos+1) != -1) {	// and only one "@" symbol
	return false;
}

var periodPos = e.indexOf(".",atPos);
if (periodPos == -1) {		// and at least one "." after the "@"
	return false;
}

if (periodPos+3 > e.length) {// and at least 2 chars after the "."
	return false;
}

return true;
}



function action(f,msg,pre,wgt) {
	if (pre == 1) {
		msg = "Please enter "+msg;
	}
	alert(msg);
	f.elements[wgt].focus();
	f.elements[wgt].select();
	return false;
}



function submitlogin(f) {
	
	if (f.f_email.value === "") {
		action(f,"an e-mail address",1,"f_email");
		return false;
	}
	else
	{
		if (!validEmail(f.f_email.value)) {
			action(f,"The e-mail address that you have\nentered does not appear to be valid.",0,"f_email");
			return false;
		}
	}
	
	
	if (f.f_pass.value === "") {
		action(f,"a password",1,"f_pass");
		return false;
	}
	
	submitonce(f);
	
	return true;
}