var img,imgover
function chnbut(img,imgover){
	img.src=imgover;
}

function preload() {
	if (!document.images) return;
	var ar = new Array();
	var ovr =new Array();
	for (var i = 0; i < preload.arguments.length; i++) {
   		ar[i] = new Image();
		ovr[i]= new Image();
   		ar[i].src = "buttons/" + preload.arguments[i] + "_p.gif";
		ovr[i].src="buttons/" + preload.arguments[i] + "_h.gif";
	}
}

function NewWindow(page, name, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable'
	win = window.open(page, name, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}