img1= new Image; 
img1.src="/images/pro.gif";
img2= new Image; 
img2.src="/images/proover.gif";
img3= new Image; 
img3.src="/images/orig.gif";
img4= new Image; 
img4.src="/images/origover.gif";
img5= new Image; 
img5.src="/images/comm.gif";
img6= new Image; 
img6.src="/images/commover.gif";