function pop_up(filename,pwidth,pheight){
	
	if ((navigator.appName.indexOf("Microsoft") != -1) ||
	    (2 < (navigator.appVersion + "3").charAt(0))) {

		url         = filename
		windowName  = "toaster";

		params      = "toolbar=0,";
		params     += "location=0,";
		params     += "directories=0,";
		params     += "status=0,";
		params     += "menubar=0,";
		params     += "scrollbars=1,";
		params     += "resizable=1,";
		params     += "width=" + pwidth + ",";
		params     += "height=" + pheight;

		win = window.open(url, windowName, params);
		if (!win.opener) {
			win.opener = window;
		}
	}
}