/* Event Functions */

// Add an event to the obj given
// event_name refers to the event trigger, without the "on", like click or mouseover
// func_name refers to the function callback when event is triggered
function addEvent(obj,event_name,func_name){
	if (obj.attachEvent){
		obj.attachEvent("on"+event_name, func_name);
	}else if(obj.addEventListener){
		obj.addEventListener(event_name,func_name,true);
	}else{
		obj["on"+event_name] = func_name;
	}
}

// Removes an event from the object
function removeEvent(obj,event_name,func_name){
	if (obj.detachEvent){
		obj.detachEvent("on"+event_name,func_name);
	}else if(obj.removeEventListener){
		obj.removeEventListener(event_name,func_name,true);
	}else{
		obj["on"+event_name] = null;
	}
}

// Stop an event from bubbling up the event DOM
function stopEvent(evt){
	evt || window.event;
	if (evt.stopPropagation){
		evt.stopPropagation();
		evt.preventDefault();
	}else if(typeof evt.cancelBubble != "undefined"){
		evt.cancelBubble = true;
		evt.returnValue = false;
	}
	return false;
}

// Get the obj that starts the event
function getElement(evt){
	if (window.event){
		return window.event.srcElement;
	}else{
		return evt.currentTarget;
	}
}
// Get the obj that triggers off the event
function getTargetElement(evt){
	if (window.event){
		return window.event.srcElement;
	}else{
		return evt.target;
	}
}
// For IE only, stops the obj from being selected
function stopSelect(obj){
	if (typeof obj.onselectstart != 'undefined'){
		addEvent(obj,"selectstart",function(){ return false;});
	}
}

/*    Caret Functions     */

// Get the end position of the caret in the object. Note that the obj needs to be in focus first
function getCaretEnd(obj)
{
	if(typeof obj.selectionEnd != "undefined")
	{
		return obj.selectionEnd;
	}
	else if(document.selection&&document.selection.createRange)
	{
		var M=document.selection.createRange();

		try
		{
			var Lp = M.duplicate();
			Lp.moveToElementText(obj);
		}
		catch(e)
		{
			var Lp=obj.createTextRange();
		}

		Lp.setEndPoint("EndToEnd",M);
		var rb=Lp.text.length;

		if(rb>obj.value.length)
		{
			return -1;
		}
		return rb;
	}
}

// Get the start position of the caret in the object
function getCaretStart(obj)
{
	if(typeof obj.selectionStart != "undefined")
	{
		return obj.selectionStart;
	}
	else if(document.selection && document.selection.createRange)
	{
		var M=document.selection.createRange();

		try
		{
			var Lp = M.duplicate();
			Lp.moveToElementText(obj);
		}
		catch(e)
		{
			var Lp=obj.createTextRange();
		}
		if (Lp && M.moveToBookmark && M.moveToElementText)
		{
			Lp.setEndPoint("EndToStart",M);
		}
		if (!Lp)
		{
			return -1;
		}
		if (!Lp.text)
		{
			return -1;
		}
		var rb=Lp.text.length;

		if(rb>obj.value.length)
		{
			return -1;
		}

		return rb;
	}
}
// sets the caret position to l in the object
function setCaret(obj,l){
	obj.focus();
	if (obj.setSelectionRange){
		obj.setSelectionRange(l,l);
	}else if(obj.createTextRange){
		m = obj.createTextRange();
		m.moveStart('character',l);
		m.collapse();
		m.select();
	}
}
// sets the caret selection from s to e in the object
function setSelection(obj,s,e){
	obj.focus();
	if (obj.setSelectionRange){
		obj.setSelectionRange(s,e);
	}else if(obj.createTextRange){
		m = obj.createTextRange();
		m.moveStart('character',s);
		m.moveEnd('character',e);
		m.select();
	}
}

/*    Escape function   */
String.prototype.addslashes = function(){
	return this.replace(/(["\\\.\|\[\]\^\*\+\?\$\(\)])/g, '\\$1');
}
String.prototype.trim = function () {
    return this.replace(/^\s*(\S*(\s+\S+)*)\s*$/, "$1");
};
/* --- Escape --- */

/* Offset position from top of the screen */
function curTop(obj){
	toreturn = 0;
	while(obj){
		toreturn += obj.offsetTop;
		obj = obj.offsetParent;
	}
	return toreturn;
}
function curLeft(obj){
	toreturn = 0;
	while(obj){
		toreturn += obj.offsetLeft;
		obj = obj.offsetParent;
	}
	return toreturn;
}
/* ------ End of Offset function ------- */

/* Types Function */

// is a given input a number?
function isNumber(a) {
    return typeof a == 'number' && isFinite(a);
}

/* Object Functions */

function replaceHTML(obj,text){
	while(el = obj.childNodes[0]){
		obj.removeChild(el);
	};
	obj.appendChild(document.createTextNode(text));
}

/* Misc. Functions */
function awUriEncode (value)
{
	if(encodeURIComponent) return encodeURIComponent(value);
	if(escape) return escape(value);
}

function awGetHttp()
{
	var awHttpRequest = null;

	try
	{
		awHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (e)
	{
		try
		{
			awHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (E)
		{
			awHttpRequest = false;
		}
	}

	if (!awHttpRequest && typeof XMLHttpRequest != 'undefined')
	{
		try
		{
			awHttpRequest = new XMLHttpRequest();
		}
		catch (e)
		{
			awHttpRequest = false;
		}
	}

	if (!awHttpRequest && window.createRequest)
	{
		try
		{
			awHttpRequest = window.createRequest();
		}
		catch (e)
		{
			awHttpRequest = false;
		}
	}

	if (awHttpRequest)
	{
		return awHttpRequest;
	}
	else
	{
		throw "failed to initialize";
	}
}