// JavaScript Document
function addLoadListener(fn)
{

    if(typeof window.addEventListener != 'undefined')
	{
		window.addEventListener('load',fn,false);
	}
	else if (typeof document.addEventListener != 'undefined')
	{
		document.addEventListener('load', fn, false);
	}
	else if (typeof window.attachEvent != 'undefined')
	{
		window.attachEvent('onload', fn);
	}
	else
	{
		var oldfn = window.onload;
		if(typeof window.onload != 'function')
		{
			window.onload = fn;
		}
		else
		{
			window.onload = function()
			{
				oldfn();
				fn();
			};
		}
	}
};
function attachEventListener(target, eventType, functionRef, capture){
	if(typeof target.addEventListener != "undefined"){
		target.addEventListener(eventType, functionRef, capture);
	}
	else if (typeof target.attachEvent != "undefined"){
		target.attachEvent("on" + eventType, functionRef);
	}
	else {
		eventType = "on" + eventType;
		
		if(typeof target [evetType] == "function"){
			var oldListener = target[eventType];
			target[eventType] = function(){
				oldListener();
				return functionRef;
			};
		}
		else {
			target[eventType] = functionRef;
		}
	}
	return true;
}

function getElementsByClassName(oElm, strTagName, oClassNames){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	var arrRegExpClassNames = new Array();
	if(typeof oClassNames == "object"){
		for(var i=0; i<oClassNames.length; i++){
			arrRegExpClassNames.push(new RegExp("(^|\s)" + oClassNames[i].replace(/-/g, "\-") + "(\s|$)"));
		}
	}
	else{
		arrRegExpClassNames.push(new RegExp("(^|\s)" + oClassNames.replace(/-/g, "\-") + "(\s|$)"));
	}
	var oElement;
	var bMatchesAll;
	for(var j=0; j<arrElements.length; j++){
		oElement = arrElements[j];
		bMatchesAll = true;
		for(var k=0; k<arrRegExpClassNames.length; k++){
			if(!arrRegExpClassNames[k].test(oElement.className)){
				bMatchesAll = false;
				break;
			}
		}
		if(bMatchesAll){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function answerFacts(){

	var answerDiv = getElementsByClassName(document,"div","answerButtons")
	if ( answerDiv == null ) return;
	if ( answerDiv.length == 0 ) return;
	anch1 = answerDiv[0].getElementsByTagName("a");
	for(i=0; i<anch1.length;i++){
		attachEventListener(anch1[i], "mousedown", popdivAnswer, false);
	}
	return true;
};

function popdivAnswer(eventType){
    if(typeof eventType.srcElement!="undefined"){
		srcEl=eventType.srcElement.parentNode;
	} else {
		srcEl=this;
	}
	
	if(srcEl==anch1[0]){
	    trueBtn="btn_true";
	    falseBtn="btn_falseLight";
	}else{
	    trueBtn="btn_trueLight";
	    falseBtn="btn_false";
	}
    buttons=getElementsByClassName(document, "div", "answerButtons");
    var result='<div class="trueAnsw" style="height:16px; background:url(../Images/'+trueBtn+'.gif) no-repeat"></div><div class="falseAnsw" style="height:16px; background:url(../Images/'+falseBtn+'.gif) top left no-repeat"></div>';
    buttons[0].innerHTML=result;
    answerDiv = getElementsByClassName(document, "div", "answerCorrect");
    answerDiv[0].style.display="block";
    return false;
}



addLoadListener(answerFacts);