if (num != "0") {
obj= document.getElementById(num);
obj.setAttribute('className','active');
obj.setAttribute('class','active');
}

if (num_menusup != "0") {
obj_menu= document.getElementById(num_menusup);
obj_menu.setAttribute('className','active');
obj_menu.setAttribute('class','active');
}

if (num_menu != "0") {
obj_menu= document.getElementById(num_menu);
obj_menu.setAttribute('className','active');
obj_menu.setAttribute('class','active');
}

 function DoPrint(){
    if (window.print)
       window.print();
    else
       alert("Imposible imprimir el documento.");
	 }