ns4 = (document.layers) ? true : false
ie4 = (document.all) ? true : false

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) {
		mid_01_over = newImage("gfx/mid-icons1.gif");
		mid_02_over = newImage("gfx/mid-icons2.gif");
		mid_03_over = newImage("gfx/mid-icons3.gif");
		mid_04_over = newImage("gfx/mid-icons4.gif");
		mid_05_over = newImage("gfx/mid-icons5.gif");		
		preloadFlag = true;
	}
}

function makeWin(url, winWidth, winHeight, chrome) {

  if (!chrome) {
    chrome = 0;
  }

  if (navigator.appName == "Netscape" && parseFloat(navigator.appVersion) >= 4) {
    var screenPosX,screenPosY;
    screenPosX = (screen.availWidth - winWidth) / 2;
    screenPosY = (screen.availHeight - winHeight) / 2;
    window.open(url, 'new','toolbar=0,location='+chrome+',directories=0,status='+chrome+',menubar=0,scrollbars=1,resizable=1,copyhistory=0,width='+winWidth+',height='+winHeight+',screenX='+screenPosX+',screenY='+screenPosY);
  }
  else {
    mister = window.open(url, 'new','toolbar=0,location='+chrome+',directories=0,status='+chrome+',menubar=0,scrollbars=1,resizable=1,copyhistory=0,width='+winWidth+',height='+winHeight);
    mister.location = url;
  }
}