if (navigator.userAgent.indexOf("Mozilla/4.0") != -1) {
	version = 4;
} else if (navigator.userAgent.indexOf("Mozilla/3.0") != -1) {
	version = 3;
} else if (navigator.userAgent.indexOf("Mozilla/2.0") != -1) {
	version = 2;
} else if (navigator.userAgent.indexOf("MSIE") != -1) {
	version = 1;
} else {
	version = 0;
}

var zoomwindow;

function popup (url,width,height) {

	scr_x = screen.width;
	scr_y = screen.height;
	
	if(screen.width > 800){
		newx = (scr_x-600)/2;
		newy = (scr_y-400)/2;
	}
	else {
		newx = (scr_x/2)-200;
		newy = (scr_y/2)-150;
	}
	
	
/* if(!document.all){
	 newx=window.pageXOffset;
	 pageW=window.innerWidth;
	 newy=window.pageYOffset;
	 pageH=window.innerHeight;
 } else {
	 newx=window.document.body.scrollLeft;
	 pageW=window.document.body.offsetWidth-90;
	 newy=window.document.body.scrollTop;
	 pageH=window.document.body.offsetHeight;
 }

	newx = parent.top +150;
	newy = parent.left +150;
*/	
	var features;
	features = "toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,fullscreen=0,width=" + width + ",height=" + height + ",top="+newy+",left="+newx+"'";
	if (zoomwindow != null) {
		if (!zoomwindow.closed)
			zoomwindow.close();
	}
	zoomwindow = window.open(url,"ZOOMWINDOW",features);
	if (version == 3 || version == 4) {
		zoomwindow.focus();
	}
}