function toggle(divName) {
	var currentA;

	currentA = (getStyleObject(divName).display == 'none') ? 'block' : 'none';
	getStyleObject(divName).display = currentA;
	}

function off(divName) {
	getStyleObject(divName).display = 'none';
	}

function on(divName) {
	getStyleObject(divName).display = 'block';
	}

function getStyleObject(objectId) {
    if(document.getElementById && document.getElementById(objectId)) {
		return document.getElementById(objectId).style;
		} else if (document.all && document.all(objectId)) {
		return document.all(objectId).style;
	 	} else if (document.layers && document.layers[objectId]) {
		return document.layers[objectId];
	   	} else {
		return false;
   		}
    }
    
function preload(imgID,level) {
	if (document.images) {            
		eval(imgID + 'over = new Image()');
		eval(imgID + 'over.src = "' + level + '/images/dynamic/' + imgID + '_on.png"');

		eval(imgID + 'reg = new Image()');
		eval(imgID + 'reg.src = "' + level + '/images/dynamic/' + imgID + '_off.png"');
		}
	}

function img_over(imgName) {
	if (document.images) {
		imgOver = eval(imgName + "over.src");
		document[imgName].src = imgOver;
		}
	}

function img_reg(imgName) {
	if (document.images) {
		imgReg = eval(imgName + "reg.src");
		document[imgName].src = imgReg;
		}
	}
	
function newWindow(mypage,myname,w,h,features) {
	if(screen.width){
		var winl = (screen.width-w)/2;
		var wint = (screen.height-h)/2;
		} else {winl = 0;wint =0;}

	if (winl < 0) winl = 0;
	if (wint < 0) wint = 0;

	var settings = 'height=' + h + ',';
	settings += 'width=' + w + ',';
	settings += 'top=' + wint + ',';
	settings += 'left=' + winl + ',';
	settings += features;

	win = window.open(mypage,myname,settings);
	win.window.focus();
	}