pic1= new Image(); 
pic1.src="img/menu1.gif";
pic2= new Image(); 
pic2.src="img/menu2.gif";
pic3= new Image(); 
pic3.src="img/menu1_1_.gif";
pic4= new Image(); 
pic4.src="img/menu1_2_.gif";
pic5= new Image(); 
pic5.src="img/menu1_3_.gif";
pic6= new Image(); 
pic6.src="img/menu2_1_.gif";
pic7= new Image(); 
pic7.src="img/menu2_2_.gif";
pic8= new Image(); 
pic8.src="img/menu2_3_.gif";
pic9= new Image(); 
pic9.src="img/menu2_4_.gif";
pic10= new Image(); 
pic10.src="img/menu2_5_.gif";
pic11= new Image(); 
pic11.src="img/menu2_6_.gif";
pic12= new Image(); 
pic12.src="img/menu3_.gif";
pic13= new Image(); 
pic13.src="img/menu4_.gif";
pic14= new Image(); 
pic14.src="img/menu5_.gif";
pic15= new Image(); 
pic15.src="img/portada_buks.gif";
pic16= new Image(); 
pic16.src="img/buk_cocinas.gif";
pic17= new Image(); 
pic17.src="img/buk_contract.gif";
pic18= new Image(); 
pic18.src="img/adplus.gif";
pic19= new Image(); 
pic19.src="img/buk_procor.jpg";
pic20= new Image(); 
pic20.src="img/bks.jpg";