// JavaScript Document

function OpenCat(cat,img){

    var image=new Image();
    image.src=img.src;
 
	if(cat.style.display=="none")
	{
	cat.style.display="";
	img.src="/images/class2.gif";
	
	}
	else 
	{
	cat.style.display="none"; 
	img.src="/images/class1.gif";
	}
}