/*
* Convenient for testing ie vs. ff
*/
var agt=navigator.userAgent.toLowerCase();
var ie  = (agt.indexOf("msie") != -1);

/*
* Class: Loader
* Use JSON to import scripts/data
*
* var load = new Loader();
* load.loadJS("act.php?test",function(){
* 	var x = load.response.array[0];
* });
*/
function Loader() {
	this.ns = document.createElement("script");
	this.engine="";
	this.callBack;
	this.response;
	this.hash;
	
	// Use JSON to load new scripts
	var loadJS = function(request,cb) {		
		if(typeof(cb)=="function") this.callBack=cb;
		else request += "&cb="+cb;
		
		request += "&json";
				
		this.ns.setAttribute("src",this.engine+request);
		document.getElementsByTagName("body")[0].appendChild(this.ns);
		
		this.listenCallBack();
	}; this.loadJS = loadJS;
	
	// Wait and listen for the callback function
	var listenCallBack = function() {
		var self = this;
		var listenTimer = setInterval(function() {
			if(self.response!="") {
				self.callBack();
				self.callBack = "";
				self.response = "";
				clearInterval(listenTimer);
			}
		},100);
	}; this.listenCallBack = listenCallBack;
}

/*
* Creates handlers
*/
function makeRequestObject()
{
	if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	} 
	else if(window.ActiveXObject) {
    	return new ActiveXObject("Microsoft.XMLHTTP");
	} 
}	

/*
* Simplifies remote requests
*/
function sendGetReq(reqOb,reqURL) {
	if (reqOb.readyState == 4 || reqOb.readyState == 0) {
		reqOb.open("GET", reqURL, true);
		reqOb.onreadystatechange = handlerFunc;
		reqOb.send(null);
	}
}

/*
* Same as above except using post headers
*/
function sendPostReq(reqOb,reqURL,input) {
	var output="";
	if(typeof(input)=="object") {
		var parts=input.elements;
		for(i=0;i<parts.length;i++) { //>
		
			/* special input case */
			if(parts[i].type=="select-multiple") {
				for(var j=0; j< parts[i].options.length; j++) {
					if(parts[i].options[j].selected)
						output += "&"+parts[i].name+"="+parts[i].options[j].value;
				}
				continue;
			}
			/* else */
			if(parts[i].checked==true) parts[i].value = 1;
			output += "&"+parts[i].name+"="+parts[i].value.replace(/&amp;/g,"|and|");
		}
	} else
		output = input;
	if (reqOb.readyState == 4 || reqOb.readyState == 0) {
		reqOb.open("POST", reqURL, true);
		reqOb.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		reqOb.onreadystatechange = handlerFunc;
		reqOb.send(output);
	}
}

/*
* Function: popWindow
*/
function popWindow(id,url,x,y)
{
	day = new Date();
    eval(id+"=window.open(url,'"+id+"','toolbar=0,scrollbars=0,location=0,statusbar=1,menubar=0,resizable=0,width="+x+",height="+y+",left=400,top=300');");
}

/*
* Function: in_array(arry,toFind)
* Ret true if toFind is in array. Emulates PHP's function
*/
function in_array(arry,toFind) {
	return ('||'+arry.join('||')+'||').indexOf('||'+toFind+'||') > -1;
}

/*
* Redirect
*/
function redirect(mylocation,mytime) {
	var rDTime = setTimeout( function(){
		location.href = mylocation.replace('#','');
	},mytime);
}

/*
* getObj - return an object
*/
function getObj(name) {	
	obj = document.getElementById(name);
	if(obj==null){ alert("Object ID: "+name+" could not be found."); }
	return obj; 
}



function Querystring(qs) { // optionally pass a querystring to parse
	this.params = {};
	
	if (qs == null) qs = location.search.substring(1, location.search.length);
	if (qs.length == 0) return;

// Turn <plus> back to <space>
// See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
	qs = qs.replace(/\+/g, ' ');
	var args = qs.split('&'); // parse out name/value pairs separated via &
	
// split out each name=value pair
	for (var i = 0; i < args.length; i++) {
		var pair = args[i].split('=');
		var name = decodeURIComponent(pair[0]);
		
		var value = (pair.length==2)
			? decodeURIComponent(pair[1])
			: name;
		
		this.params[name] = value;
	}
}

Querystring.prototype.get = function(key, default_) {
	var value = this.params[key];
	return (value != null) ? value : default_;
}

Querystring.prototype.contains = function(key) {
	var value = this.params[key];
	return (value != null);
}