var xmlFile;
var validateObj = new Array();

function refreshForm(varName, varValu) {
    var newURL = window.location.pathname + "?" + varName + "=" + varValu;
	document.forms[0].action = newURL;
	document.forms[0].submit()
}

function importXML(file, func) {
	if(document.implementation && document.implementation.createDocument) {
		xmlFile = document.implementation.createDocument("", "", null);
		xmlFile.onload = func;
	} else if(window.ActiveXObject) {
		xmlFile = new ActiveXObject("Microsoft.XMLDOM");
		xmlFile.onreadystatechange = function () {
			if(xmlFile.readyState == 4) {func();};
		};
	}
	xmlFile.load(file);
}

function parseFormXml() {
	if(document.getElementById(xmlFile.documentElement.getAttribute("id")) == null) {return;};
	form = document.getElementById(xmlFile.documentElement.getAttribute("id"));
	addEvent(form, "submit", onsubmitCheck, false);
	inputs = xmlFile.getElementsByTagName("inputbox");
	for(var i = 0; i < inputs.length; i++) {
		val = new inputValidate(inputs[i]);
		validateObj[val.id] = val;
		addEvent(val.inputf, "blur", onblurCheck, false);
	};
}

function getXmlUrl() {
	var url = window.location.href;
	url = url.split("?")[0];
	url = url.match(/\w+\.[a-zA-Z0-9]+$/).toString();
	var dot = url.lastIndexOf(".");
	url = url.substring(0, dot);
	url = url + ".xml";
	return url;
}



function inputValidate(node) {
	this.id = node.getAttribute("id");
	this.inputf = document.getElementById(this.id);
	this.valid = true;
	this.minr = node.getAttribute("min");
	this.maxr = node.getAttribute("max");
	this.sreq = (node.getAttribute("req") == "true");
	this.regs = new Array();
	curNode = node.getElementsByTagName("regex");
	for(i = 0; i < curNode.length; i++ ) {
		if(curNode[i] != null) {this.regs[i] = new RegExp(curNode[i].childNodes[0].nodeValue);};
	};
	this.creq = new Array();
	curNode = node.getElementsByTagName("coreq");
	for(i = 0; i < curNode.length; i++ ) {
		if(curNode[i] != null) {this.creq[i] = document.getElementById(curNode[i].childNodes[0].nodeValue);};
	};
	err = node.getElementsByTagName("errmsg")[0];
	if(err != null) {
		this.error = err.childNodes[0].nodeValue;
	} else {
		this.error = null;
	};
	this.name = node.getAttribute("lbl");
	this.parentClass = this.inputf.parentNode.className;
	
	this.errMsgL = function() {
		var strTmp = this.name.substring(0,1).toUpperCase();
		var strInt = strTmp + this.name.substring(1, this.name.length) + " must ";
		if(this.minr != null) {
			if(this.maxr != null) {
				strTmp = strInt + "be between " + this.minr + " and " + this.maxr;
			} else {
				strTmp = strInt + "have more than " + this.minr;
			};
		} else {
			if(this.maxr != null) {
				strTmp = strInt + "have less than " + this.maxr;
			} else {
				strTmp = "have more than 0";
			};
		};
		strTmp += " characters.";
		return strTmp;
	};
	
	this.markInvalid = function(errMsg, skipCoreq) {
  		this.inputf.parentNode.className = this.parentClass + " errorarea";
  		if(this.valid == false) {
  			errorNode = document.getElementById(this.id + "errmsg");
  			textNode = document.createTextNode(errMsg);
  			errorNode.replaceChild(textNode, errorNode.childNodes[0]);
  		} else {
			errp = document.createElement("p");
			errp.className = "errortext";
			errp.setAttribute("id", this.id + "errmsg");
			textNode = document.createTextNode(errMsg);
			errp.appendChild(textNode);
			this.inputf.parentNode.appendChild(errp);
  		};
  		this.valid = false;
		if((!skipCoreq)&&(this.creq.length > 0)) {
			var coreqField;
			for(i = 0; i < this.creq.length; i++) {
				coreqField = validateObj[this.creq[i].getAttribute("id")];
				coreqField.markInvalid(coreqField.error, true);
			};
		};
	};
	
	this.markValid = function(skipCoreq) {
  		if(this.valid == false) {
  			errorNode = document.getElementById(this.id + "errmsg");
  			this.inputf.parentNode.removeChild(errorNode);
  		};
  		this.valid = true;
  		this.inputf.parentNode.className = this.parentClass;
		if((!skipCoreq)&&(this.creq.length > 0)) {
			var coreqField;
			for(i = 0; i < this.creq.length; i++) {
				coreqField = validateObj[this.creq[i].getAttribute("id")];
				if(this.creq[i].value == "") {
					coreqField.markValid(true);
				} else {
					if(coreqField.valid) {coreqField.markValid(true);};
				};
			};
		};
	};
	
	this.check = function() {
		var fldValue = this.inputf.value;
		var getError = "";
		if(fldValue == "") {
			getError = "You must fill out this field.";
			if(this.creq.length > 0) {
				var coreqsOK;
				if(this.sreq) {
					var coreqsOK = true;
					for(i = 0; i < this.creq.length; i++) {
						if(this.creq[i].value != "") {
							coreqsOK = false;
							break;
						};
					};
				} else {
					var coreqsOK = false;
					for(i = 0; i < this.creq.length; i++) {
						if((this.creq[i].value != "")&&(validateObj[this.creq[i].getAttribute("id")].valid == true)) {
							coreqsOK = true;
							break;
						};
					};
				};
				if(coreqsOK) {
					this.markValid();
					return;
				};
			} else {
				if(this.sreq == false) {
					return;
				};
			};
		} else {
			if(((this.minr != null)&&(fldValue.length < this.minr)) || ((this.maxr != null)&&(fldValue.length > this.maxr))) {
				getError = this.errMsgL();
			};
			if(this.regs.length > 0) {
				var formatOK = false;
				for(var i = 0; i < this.regs.length; i++) {
					if(this.regs[i].test(fldValue)) {
						formatOK = true;
						break;
					};
				};
				if(formatOK == false) {getError = this.error;};
			};
		};
		var reqCoreq = (this.sreq == true) && (this.creq.length > 0);
		if(getError == "") {
			this.markValid(reqCoreq);
		} else {
			this.markInvalid(getError, reqCoreq);
		};
	};
}

function onsubmitCheck(event) {
	var allOk = true;
	for(var i in validateObj) {
		validateObj[i].check();
		if(validateObj[i].valid == false) {allOk = false;};
	};
	if(allOk == false) {
		message = "This form requires some more information from you!\n";
		message += "Please review the fields in red and provide the correct information.";
		alert(message);
		if(document.all) {
			event.returnValue = false;
		} else {
			event.preventDefault();
		};
	};
}

function addEvent(obj, etyp, elis, ucap) {
	if(obj.addEventListener) {
		obj.addEventListener(etyp, elis, ucap);
		return true;
	} else if(obj.attachEvent) {
		var objAttach = obj.attachEvent("on"+etyp, elis);
		return objAttach;
	} else {
		return false;
	};
}

function onblurCheck(event) {
	if(document.all) {
		id = event.srcElement.getAttribute("id");
	} else {
		id = this.getAttribute("id");
	};
	validateObj[id].check();
}

importXML(getXmlUrl(), parseFormXml);