function openWindow(url, name, width, height, features) {
	    var win;
	    var top = 0;
	    var left = 0;
    	
	    if (screen.width > width) left = (screen.width - width) / 2;
	    if (screen.height > height) top = (screen.height - height) / 2;
    	
	    if (typeof(features) == "undefined") win = window.open(url, name, 'left='+left+',top='+top+',screenX='+left+',screenY='+top+',width='+width+',height='+ height);
	    else win = window.open(url, name, 'left='+left+',top='+top+',screenX='+left+',screenY='+top+',width='+width+',height='+ height +', ' + features);
    		
	    if (navigator.appName != 'Microsoft Internet Explorer')  { if ( window.focus )  win.focus()};
    }