var IE = (document.all ? true : false);
var NS4 = (document.layers ? true : false);
var ScreenX = screen.width; 
var ScreenY = screen.height;
if(IE) {
     doc = "document";
     sty = "";
     htm = ".document"
} else if(NS4) {
     doc = "document.all";
     sty = ".style";
     htm = ""
}
function openCenter(url, name, feat, w, h){

        window.open(url, name, "width=" + w + ",height=" + h + ",left=" + ((ScreenX / 2) - (w / 2)) + ",top=" + ((ScreenY / 2) - (h / 2) - 20) + "," + feat);
}

function image_preview(id, w, h){
	
		w = w - 40;
		h = h - 20;
	
	window.open(site_root_url+"/go.idecs?m=images&f=images_preview&id=" + id, name, "width=" + (w) + ",height=" + (h) + ",left=" + ((ScreenX / 2) - (w / 2)) + ",top=" + ((ScreenY / 2) - (h / 2) - 20) + "," + 'scrollbars=yes');

}