// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= "Please fill in the following fields:"
language["start"]	= "   ";
language["field"]	= " ";
language["require"]	= " ";
language["min"]		= " and must consist of at least ";
language["max"]		= " and must not contain more than ";
language["minmax"]	= " and no more than ";
language["chars"]	= " characters";
language["num"]		= " and must contain a number";
language["email"]	= " [this must be a valid e-mail address (yourname@domain.com)]";
// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
// n = name of the input field (Required)
// type= string, num, email (Required)
// min = the value must have at least [min] characters (Optional)
// max = the value must have maximum [max] characters (Optional)
// d = (Optional)
// -----------------------------------------------------------------------------

function define(n, type, HTMLname, min, max, d) {
var p;
var i;
var x;
if (!d) d = document;
if ((p=n.indexOf("?"))>0&&parent.frames.length) {
d = parent.frames[n.substring(p+1)].document;
n = n.substring(0,p);
}
if (!(x = d[n]) && d.all) x = d.all[n];
for (i = 0; !x && i < d.forms.length; i++) {
x = d.forms[i][n];
}
for (i = 0; !x && d.layers && i < d.layers.length; i++) {
x = define(n, type, HTMLname, min, max, d.layers[i].document);
return x;       
}
eval("V_"+n+" = new formResult(x, type, HTMLname, min, max);");
checkObjects[eval(checkObjects.length)] = eval("V_"+n);
}

function formResult(form, type, HTMLname, min, max) {
this.form = form;
this.type = type;
this.HTMLname = HTMLname;
this.min  = min;
this.max  = max;
}

function validate() {
	if (checkObjects.length > 0) {
	errorObject = "";
	for (i = 0; i < checkObjects.length; i++) {
		validateObject = new Object();
		validateObject.form = checkObjects[i].form;
		validateObject.HTMLname = checkObjects[i].HTMLname;
		validateObject.val = checkObjects[i].form.value;
		validateObject.len = checkObjects[i].form.value.length;
		validateObject.min = checkObjects[i].min;
		validateObject.max = checkObjects[i].max;
		validateObject.type = checkObjects[i].type;
		if (validateObject.type == "num" || validateObject.type == "string") {
		if ((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val))) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['num'] + "\n";
		} else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max)) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['minmax'] + validateObject.max+language['chars'] + "\n";
		} else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min)) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['min'] + validateObject.min + language['chars'] + "\n";
		} else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max)) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + language['max'] + validateObject.max + language['chars'] + "\n";
		} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";
		}
		} else if(validateObject.type == "email") {
		// Checking existense of "@" and ".". 
		// Length of must >= 5 and the "." must 
		// not directly precede or follow the "@"
		if ((validateObject.val.indexOf("@") == -1) || (validateObject.val.charAt(0) == ".") || (validateObject.val.charAt(0) == "@") || (validateObject.len < 6) || (validateObject.val.indexOf(".") == -1) || (validateObject.val.charAt(validateObject.val.indexOf("@")+1) == ".") || (validateObject.val.charAt(validateObject.val.indexOf("@")-1) == ".")) { errors += language['start'] + language['field'] + validateObject.HTMLname + language['email'] + "\n"; }
      		}
   	}
	}

	if (errors) {
	alert(language["header"].concat("\n" + errors));
	errors = "";
	returnVal = false;
	} else {
	returnVal = true;
   }
}

function checkBrowser() {
bName = navigator.appName;
bVer = parseInt(navigator.appVersion);

if  (bName == "Netscape" && bVer < 4) window.location='browser.html' ;                                       
if (bName == "Microsoft Internet Explorer" && bVer < 4) window.location='browser.html'; 
        
}




	var new_windowWindow=null;

	function new_window(mypage,myname,w,h,pos,infocus){
		if(pos=='random'){
			LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;
			TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;
		}
		if(pos=='center'){
			LeftPosition=(screen.width)?(screen.width-w)/2:100;
			TopPosition=(screen.height)?(screen.height-h)/2:100;
		} else 
			if((pos!='center' && pos!='random') || pos==null){LeftPosition=100;TopPosition=100;}settings='width='+ w + ',height='+ h + ',top=' + TopPosition + ',left=' + LeftPosition + ',location=no,directories=no,menubar=no,toolbar=no,status=no,scrollbars=no,resizable=no,dependent=no';
			new_windowWindow=window.open('',myname,settings);
			if(infocus=='front'){new_windowWindow.focus();new_windowWindow.location=mypage;
		}
	}


	function getElement(name) {
		element = document.getElementById(name);
		return element;
	}

	function createCookie(name,value,days) {
	
		if (days) {
			var date = new Date();
			date.setTime(date.getTime()+(days*24*60*60*1000));
			var expires = "; expires="+date.toGMTString();
		}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}
	
	
	function readCookie(name) {
	
		var nameEQ = name + "=";
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++)
		{
			var c = ca[i];
			while (c.charAt(0)==' ') c = c.substring(1,c.length);
			if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
		}
		return null;
	}
	
	
	function eraseCookie(name) {
	
		createCookie(name,"",-1);
	}
	
	function testCookies() {
	
		eraseCookie("test");
		createCookie("test","yes", "1");
		var outcome = "Disabled";
		if(readCookie("test") == "yes") { outcome =  "Enabled"; } else { outcome = "Disabled"; } 
		return outcome;
	}