//General
///////////////////////////////////////////
function _$(id) {
	return document.getElementById(id);	
}
//Events
///////////////////////////////////////////
var __eventListeners = [];

function addEventListener(instance, eventName, listener) {
   var listenerFn = listener;
   if (instance.addEventListener) {
       instance.addEventListener(eventName, listenerFn, false);
   } else if (instance.attachEvent) {
       listenerFn = function() {
           listener(window.event);
       }
       instance.attachEvent("on" + eventName, listenerFn);
   } else {
       throw new Error("Event registration not supported");
   }
   var event = {
       instance: instance,
       name: eventName,
       listener: listenerFn
   };
   __eventListeners.push(event);
   return event;
}
///////////////////////////////////////////
function removeEventListener(event) {
   var instance = event.instance;
   if (instance.removeEventListener) {
       instance.removeEventListener(event.name, event.listener, false);
   } else if (instance.detachEvent) {
       instance.detachEvent("on" + event.name, event.listener);
   }
   for (var i = 0; i < __eventListeners.length; i++) {
       if (__eventListeners[i] == event) {
           __eventListeners.splice(i, 1);
           break;
       }
   }
}
///////////////////////////////////////////
function unregisterAllEvents() {
   while (__eventListeners.length > 0) {
       removeEventListener(__eventListeners[0]);
   }
}

// Caret position
///////////////////////////////
function GetCaretPos(ctrl) {

	var CaretPos = 0;
	// IE Support
	if (document.selection) {

		ctrl.focus ();
		var Sel = document.selection.createRange ();

		Sel.moveStart ('character', -ctrl.value.length);

		CaretPos = Sel.text.length;
	}
	// Firefox support
	else if (ctrl.selectionStart || ctrl.selectionStart == '0')
		CaretPos = ctrl.selectionStart;

	return (CaretPos);

}

///////////////////////////////
function SetCaretPos(ctrl, pos)
{
	if(ctrl.setSelectionRange)
	{
		ctrl.focus();
		ctrl.setSelectionRange(pos,pos);
	}
	else if (ctrl.createTextRange) {
		var range = ctrl.createTextRange();
		range.collapse(true);
		range.moveEnd('character', pos);
		range.moveStart('character', pos);
		range.select();
	}
}