//////////////////////////////////////////////////////////////////
// eventutil.js
//
// David Yang (prowyh@hotmail.com)
// Copyright (C) Levensoft Co. Ltd. (www.levensoft.com)
//
// 2008.4.22
//////////////////////////////////////////////////////////////////

var EventUtil = new Object;
EventUtil.addEventHandler = function (oTarget, sEventType, fnHandler)
{
    if (oTarget.addEventListener)
    {
        oTarget.addEventListener(sEventType, fnHandler, false);
    }
    else if (oTarget.attachEvent)
    {
        oTarget.attachEvent("on" + sEventType, fnHandler);
    }
    else
    {
        oTarget["on" + sEventType] = fnHandler;
    }
};
        
EventUtil.removeEventHandler = function (oTarget, sEventType, fnHandler)
{
    if (oTarget.removeEventListener)
    {
        oTarget.removeEventListener(sEventType, fnHandler, false);
    }
    else if (oTarget.detachEvent)
    {
        oTarget.detachEvent("on" + sEventType, fnHandler);
    }
    else
    {
        oTarget["on" + sEventType] = null;
    }
};

EventUtil.formatEvent = function (oEvent)
{
    if (isIE && isWin)
    {
        oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
        oEvent.eventPhase = 2;
        oEvent.isChar = (oEvent.charCode > 0);
        oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
        oEvent.pageY = oEvent.clientY + document.body.scrollTop;
        
        oEvent.preventDefault = function ()
        {
            this.returnValue = false;
        };

        if (oEvent.type == "mouseout")
        {
            oEvent.relatedTarget = oEvent.toElement;
        }
        else if (oEvent.type == "mouseover")
        {
            oEvent.relatedTarget = oEvent.fromElement;
        }

        oEvent.stopPropagation = function ()
        {
            this.cancelBubble = true;
        };

        oEvent.target = oEvent.srcElement;
        oEvent.time = (new Date).getTime();
    }
    
    return oEvent;
};

EventUtil.getEvent = function()
{
    if (window.event)
    {
        return this.formatEvent(window.event);
    }
    else
    {
        return EventUtil.getEvent.caller.arguments[0];
    }
};
EventUtil.getEventSource = function()
{
    return EventUtil.getEvent().target;
};