if (document.images) {
	
  p1on = new Image();
  p1on.src = "images/accesar-on.gif";
  p1off = new Image();
  p1off.src = "images/accesar.gif";

  p2on = new Image();
  p2on.src = "images/accesar-on.gif";
  p2off = new Image();
  p2off.src = "images/accesar.gif";
  
  p3on = new Image();
  p3on.src = "images/accesar-on.gif";
  p3off = new Image();
  p3off.src = "images/accesar.gif";
  
  p4on = new Image();
  p4on.src = "images/accesar-on.gif";
  p4off = new Image();
  p4off.src = "images/accesar.gif";
  
  p5on = new Image();
  p5on.src = "images/accesar-on.gif";
  p5off = new Image();
  p5off.src = "images/accesar.gif";

  p6on = new Image();
  p6on.src = "images/accesar1-on.gif";
  p6off = new Image();
  p6off.src = "images/accesar1.gif";

  p7on = new Image();
  p7on.src = "images/accesar1-on.gif";
  p7off = new Image();
  p7off.src = "images/accesar1.gif";

  p8on = new Image();
  p8on.src = "images/accesar1-on.gif";
  p8off = new Image();
  p8off.src = "images/accesar1.gif";

  op1on = new Image();
  op1on.src = "images/mail-on.gif";
  op1off = new Image();
  op1off.src = "images/mail.gif";

  op2on = new Image();
  op2on.src = "images/salir-on.gif";
  op2off = new Image();
  op2off.src = "images/salir.gif";

  op3on = new Image();
  op3on.src = "images/close-on.gif";
  op3off = new Image();
  op3off.src = "images/close.gif";
  
  op4on = new Image();
  op4on.src = "images/close-on.gif";
  op4off = new Image();
  op4off.src = "images/close.gif"; 
}
function changeImages() {
 	 if (document.images) {
   	 for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
 		}
	}
}