// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var foundBy		= "";
var checkObjects	= new Array();
var errors		= "";
var passChk = false;
var returnVal		= false;
var language		= new Array();

var j;
var validAlpha = "abcdefghijklmnopqrstuvwxyz";
var validNumeric = "0123456789";
var temp;
var alphaOK = false;
var numericOK = false;

language["header"]	= "Please check 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"]		= "must contain a number";
language["email"]	= " must contain a valid e-mail address";
language["password"]	= " must contain a number and a letter";
// -----------------------------------------------------------------------------
// 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;
			
			switch (validateObject.type) {
				case "num":
					if ((validateObject.len <= 0) || (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";
					}
					break;
					
				case "string":
					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";
					}
					break;
					
				case "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";
					}
					break;
					
				case "password":
					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";
					}
					if (validateObject.val != document.rego.tmp_m_Password.value) {
						errors += "-> Your passwords don't match. Please re-enter." + "\n";
					}
					
					for (j=0; j<validateObject.len; j++) {
						temp = "" + validateObject.val.substring(j, j+1);
						if (validAlpha.indexOf(temp) > 0) alphaOK = true;
						if (validNumeric.indexOf(temp) > 0) numericOK = true;
					}
					if (!alphaOK || !numericOK) {
						errors += "-> Your password must contain numbers and letters." + "\n";
					}
					
					break;
			}
	
	if (validateObject.type == "num" || validateObject.type == "string") {

	} else if(validateObject.type == "email") {

		}
	}
}

//Use this example to check radio dials and check boxes, [i] represent each item for that element e.g. if you have 3 radio dials loop the for statement 3 times.
//for (i = 0; i < 5; i++){if (document.formName.elementName[i].checked){foundBy = true;break;}else{foundBy = false;}} if(!foundBy){errors += "-> You must select one of the 5 options for Free Games" + "\n";foundBy = false;}

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