var win=null;
function popUp(mypage,myname,w,h,scroll,pos){
if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=yes,menubar=no,toolbar=no,resizable=no';
win=window.open(mypage,myname,settings);}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		track01_over = newImage("../images/01/tracks/track01-over.gif");
		track02_over = newImage("../images/01/tracks/track02-over.gif");
		track03_over = newImage("../images/01/tracks/track03-over.gif");
		track04_over = newImage("../images/01/tracks/track04-over.gif");
		track05_over = newImage("../images/01/tracks/track05-over.gif");
		track06_over = newImage("../images/01/tracks/track06-over.gif");
		track07_over = newImage("../images/01/tracks/track07-over.gif");
		track08_over = newImage("../images/01/tracks/track08-over.gif");
		track09_over = newImage("../images/01/tracks/track09-over.gif");
		preloadFlag = true;
	}
}