win=null;
function displayWindow(url, width, height, left, top) {
	if (win) {
		win.close(); 
	};
        win=window.open(url, "name",'width=' + width + ',height=' + height + ', left=' + left + ', top=' + top + ', resizable=0,scrollbars=0,menubar=0' );
	win.focus();
}