img1=new Image();
img1.src="img/trans.gif";
img2=new Image();
img2.src="img/trans.gif";
function leftNav(theListId, theImageId){
foldercontent = document.getElementById(theListId);
folderImage = document.getElementById(theImageId);
if (foldercontent.style.display=="none"){
foldercontent.style.display="inline";
folderImage.src = "img/trans.gif";}
else{
foldercontent.style.display="none";
folderImage.src = "img/trans.gif";}
}