function ventanaSecundaria (URL){
	window.open("images/loading.gif","ventana1","width=500, height=330, scrollbars=yes, menubar=no, location=no, resizable=no,left=300,top=200")
	window.open(URL,"ventana1","width=500, height=330, scrollbars=yes, menubar=no, location=no, resizable=no,left=300,top=200")
}