// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
var checkObjects	= new Array();
var errors			= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= "Please fix the following:"
language["start"]	= "->";
//language["field"]	= " Field ";
language["field"]	= "";
//ej
language["checkbox"]= " must be checked";
language["require"]	= " 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";
// -----------------------------------------------------------------------------
// 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() {
	//alert ("here");
	if (checkObjects.length > 0) {
	errorObject = "";
	for (i = 0; i < checkObjects.length; i++) {
		//alert(checkObjects[i].form.value);
		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"; }
      	}
      	// ej added
      	else if (validateObject.type == "checkbox") {
		    if (! document.forms[0].terms.checked) {
		    	errors += language['start'] + validateObject.HTMLname + language['checkbox'] + "\n";	
	    	}
     	}
   }
}
if (errors) {
alert(language["header"].concat("\n" + errors));
errors = "";
returnVal = false;
} else {
returnVal = true;
   }
}