imgs = new Array("/cmn/imgs/plus.gif", "/cmn/imgs/minus.gif");
image = new Array(imgs.length);
for(count = 0; count < (imgs.length - 1); count++){
	image[count] = new Image();
	image[count].src = imgs[count];
}

function ImageChange(id){
	if(window.document.images[id].src.indexOf(imgs[0]) != -1){
		window.document.images[id].src  = imgs[1];
	}else{
		window.document.images[id].src  = imgs[0];
	}
}

function treeMenu(id){
	if(document.all){
		if(document.all(id).style.display == "block"){
			document.all(id).style.display = "none";
		}else if(document.all(id).style.display == "none"){
			document.all(id).style.display = "block";
		}
	}else if(document.getElementById){
		if(document.getElementById(id).style.display == "block"){
			document.getElementById(id).style.display = "none";
		}else if(document.getElementById(id).style.display == "none"){
			document.getElementById(id).style.display = "block";
		}
	}
}