// Generic Form Validation
// Original script by Jacob Hage (jacob@hage.dk)
// Changed by Stephen Schletty (webmaster@ssm.net): now spaces in fields are ingored (leading spaced only)
// and now this script verifies select boxes.
// Also added in conditional CSS styles: if not validated background = Yellow. If validated background = White

var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= "The following error(s) occured:"
language["start"]	= "->";
language["field"]	= " The ";
language["require"]	= " field is required";
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"]	= " must contain a valid E-Mail Address";
language["terms"]	= " must be reviewed and checked";
language["checkbox"]	= " must be checked";
language["password"]	= " must be longer than 6 characters and be identical to verify password";
// -----------------------------------------------------------------------------
// 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.name = checkObjects[i].form.name;
			while(''+validateObject.val.charAt(0)==' ') {
				validateObject.val=validateObject.val.substring(1,validateObject.val.length);
			}
			validateObject.len = validateObject.val.length;
			validateObject.min = checkObjects[i].min;
			validateObject.max = checkObjects[i].max;
			validateObject.type = checkObjects[i].type;
			// added in check for radio boxes and select boxes
			if (checkObjects[i].form.type == 'select-one') {
				var is_selected = validateSelectBox(checkObjects[i].form);
				if (!is_selected) {
					errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";
					checkObjects[i].form.style.background = "Yellow";
				} else {
					checkObjects[i].form.style.background = "White";
				}
			// added in check for password fields
			} else if (checkObjects[i].form.type == 'password') {
				// make sure password = verify_password
				var pw = document.getElementById('password').value;
				var vpw = document.getElementById('verify_password').value;
				if (pw.length < 6 || pw != vpw) {
					errors += language['start'] + language['field'] + validateObject.HTMLname + language['password'] + "\n";
					document.getElementById('password').style.background = "Yellow";
					document.getElementById('verify_password').style.background = "Yellow";
				} else {
					document.getElementById('password').style.background = "White";
					document.getElementById('verify_password').style.background = "White";
				}
			} else if (checkObjects[i].form.type == 'checkbox') {
				var is_checked = document.getElementById(validateObject.name).checked;
				if (!is_checked) {
					if(validateObject.type == "terms") {
						errors += language['start'] + language['field'] + validateObject.HTMLname + language['terms'] + "\n";
					} else {
						errors += language['start'] + language['field'] + validateObject.HTMLname + language['checkbox'] + "\n";
					}
					checkObjects[i].form.style.background = "Yellow";
				} else {
					checkObjects[i].form.style.background = "White";
				}
			} else {
				// and text and textarea
				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";
						checkObjects[i].form.style.background = "Yellow";
					} 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";
						checkObjects[i].form.style.background = "Yellow";
					} 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";
						checkObjects[i].form.style.background = "Yellow";
					} 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";
						checkObjects[i].form.style.background = "Yellow";
					} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0) {
						errors += language['start'] + language['field'] + validateObject.HTMLname + language['require'] + "\n";
						checkObjects[i].form.style.background = "Yellow";
					} else {
						checkObjects[i].form.style.background = "White";
					}
				} 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";
						checkObjects[i].form.style.background = "Yellow";
					} else {
						checkObjects[i].form.style.background = "White";
					}
				}
			}
		}
	}
	if (errors) {
		alert(language["header"].concat("\n" + errors));
		errors = "";
		returnVal = false;
	} else {
		returnVal = true;
	}
	return returnVal;
}

function validateRadio(radioObj) {
	if(!radioObj)
		return "none selected";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "none selected";
	for(var x = 0; x < radioLength; x++) {
		if(radioObj[x].checked) {
			return radioObj[x].value;
		}
	}
	return "none selected";
}

function validateSelectBox(tFIELDNAME) {
	var selected_value = tFIELDNAME.options[tFIELDNAME.selectedIndex].value;
	if (selected_value.length) {
		// if select field has a value, then return it, otherwise return nothing.
		return selected_value;
	}
}