function open_window(file,name,win_width,win_height) {
  newWin = window.open(""+file,""+name,"scrollbars=yes,toolbar=0,location=0,status=0,resizable=yes,width="+win_width+",height="+win_height); }


if (document.images) {
		menu_01off = new Image(); menu_01off.src = "interface/menu_01_off.gif";
		menu_01on = new Image(); menu_01on.src = "interface/menu_01_on.gif";
		menu_02off = new Image(); menu_02off.src = "interface/menu_02_off.gif";
		menu_02on = new Image(); menu_02on.src = "interface/menu_02_on.gif";
		menu_03off = new Image(); menu_03off.src = "interface/menu_03_off.gif";
		menu_03on = new Image(); menu_03on.src = "interface/menu_03_on.gif";
		menu_04off = new Image(); menu_04off.src = "interface/menu_04_off.gif";
		menu_04on = new Image(); menu_04on.src = "interface/menu_04_on.gif";
		menu_05off = new Image(); menu_05off.src = "interface/menu_05_off.gif";
		menu_05on = new Image(); menu_05on.src = "interface/menu_05_on.gif";
		startsite_01off = new Image(); startsite_01off.src = "interface/startsite_01_off.gif";
		startsite_01on = new Image(); startsite_01on.src = "interface/startsite_01_on.gif";
		startsite_02off = new Image(); startsite_02off.src = "interface/startsite_02_off.gif";
		startsite_02on = new Image(); startsite_02on.src = "interface/startsite_02_on.gif";
		startsite_03off = new Image(); startsite_03off.src = "interface/startsite_03_off.gif";
		startsite_03on = new Image(); startsite_03on.src = "interface/startsite_03_on.gif";
		startsite_04off = new Image(); startsite_04off.src = "interface/startsite_04_off.gif";
		startsite_04on = new Image(); startsite_04on.src = "interface/startsite_04_on.gif";
		startsite_05off = new Image(); startsite_05off.src = "interface/startsite_05_off.gif";
		startsite_05on = new Image(); startsite_05on.src = "interface/startsite_05_on.gif";
}

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}
	
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}