imgout=new Image(9,9);
imgin=new Image(9,9);

imgout.src="css_images/plus.gif";
imgin.src="css_images/minus.gif";

//this switches expand collapse icons
function filter(imagename,objectsrc){
	if(document.images){
		document.images[imagename].src=eval(objectsrc+".src");
	}
}

//show OR hide funtion depends on if element is shown or hidden
function shoh(id){ 
	if(document.getElementById){ // DOM3 = IE5, NS6
		if(document.getElementById(id).style.display == "none"){
			document.getElementById(id).style.display = 'block';
			filter(("img"+id),'imgin');
		}else{
			filter(("img"+id),'imgout');
			document.getElementById(id).style.display = 'none';
		}
	}else{ 
		if(document.layers){
			if(document.id.display == "none"){
				document.id.display = 'block';
				filter(("img"+id),'imgin');
			}else{
				filter(("img"+id),'imgout');
				document.id.display = 'none';
			}
		}else{
			if(document.all.id.style.visibility == "none"){
				document.all.id.style.display = 'block';
			}else{
				filter(("img"+id),'imgout');
				document.all.id.style.display = 'none';
			}
		}
	}
}