// Generic Form Validation
// Jacob Hage (jacob@hage.dk)
//
// modified by Robert W. Hirn (rhw@nhds.net)
// added validity tests for zip code and month fields
// changed the mandatory "required", now if you put "0" as min then user can skip field but if they enter something it does validity check
// tweaked email a bit
var checkObjects	= new Array();
var errors		= "";
var returnVal		= false;
var language		= new Array();
language["header"]	= "The following error(s) occured:"
language["start"]	= "The ";
language["field"]	= " Field";
language["require"]	= " is required";
language["and"]		= " and";
language["min"]		= " must consist of at least ";
language["max"]		= "  must not contain more than ";
language["minmax"]	= " and no more than ";
language["smin"]		= " must consist of ";
language["chars"]	= " characters";
language["num"]		= " must contain a number";
language["email"]	= " must contain a valid e-mail address";
language["zipl"]		= " must be a 5 digit or 5 digit+4 zip code";
language["zip"] 		= " must contain numbers and/or a hyphen";
language["month"] 	= " must contain a month between 1 and 12";
// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
// n = name of the input field (Required)
// type= string, num, email, zip (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;
		if (checkObjects[i].form.type == "select-one") {
			validateObject.val = getSelectValue(checkObjects[i].form);
			validateObject.len = validateObject.val.length;
		} else {
			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;
		var req = "";
		if (validateObject.len != 0 || (validateObject.len == 0 && validateObject.min != 0)) {
			if (validateObject.min != 0) req = language['require']+language['and'] ;
			if (validateObject.type == "num" || validateObject.type == "string") {
				if ((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val))) { 
					errors += language['start'] + validateObject.HTMLname + language['field']  + req + language['num'] + "\n";
				} else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max)) { 
						if (validateObject.min == validateObject.max) {
							errors += language['start'] + validateObject.HTMLname + language['field']  + req + language['smin'] + validateObject.min + language['chars'] + "\n";
						} else {
							errors += language['start'] + validateObject.HTMLname + language['field']  + req + language['min'] + validateObject.min + language['minmax'] + validateObject.max+language['chars'] + "\n";
						}
				} else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min)) { 
						errors += language['start'] + validateObject.HTMLname + language['field']  + req + language['min'] + validateObject.min + language['chars'] + "\n";
				} else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max)) { 
						errors += language['start'] + validateObject.HTMLname + language['field']  + req + language['max'] + validateObject.max + language['chars'] + "\n";
				} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0) { 
					errors += language['start'] + validateObject.HTMLname + language['field']  + 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.indexOf(".") == validateObject.len - 1) || (validateObject.val.charAt(validateObject.val.indexOf("@")+1) == ".") || (validateObject.val.charAt(validateObject.val.indexOf("@")-1) == ".")) { 
						errors += language['start'] + validateObject.HTMLname + language['field']  + language['email'] + "\n"; 
					}
			} else if(validateObject.type == "month" && (validateObject.val < 1 || validateObject.val > 12)) {
					errors += language['start'] + validateObject.HTMLname + language['field'] + req + language['month'] + "\n"; 
			} else if(validateObject.type == "zip") {
					var hyphencount = 0;
					
					if (validateObject.len != 5 && validateObject.len != 10) {
						errors += language['start'] + validateObject.HTMLname + language['field'] + req + language['zipl'] + "\n"; 
					} else {
						for (var k=0; k < validateObject.len; k++) {
							if (validateObject.val.charAt(k) == "-") hyphencount++;
							if ((hyphencount > 1) || (validateObject.len == 10 && validateObject.val.charAt(5) != "-") || (validateObject.val.charAt(k) != "-" && (validateObject.val.charAt(k) < "0" || validateObject.val.charAt(k) > "9"))) {
								errors += language['start'] + validateObject.HTMLname + language['field'] + req + language['zip'] + "\n"; 
								break;
							} 
						}
					}
			}
		}
		if (errors) break;
//		alert(validateObject.HTMLname);
	}
}
if (errors) {
// alert(language["header"].concat("\n" + errors));
alert(errors);
errors = "";
returnVal = false;
} else {
returnVal = true;
   }
}
function getSelectValue(selectObject) {
return selectObject.options[selectObject.selectedIndex].value
}