image1 = new Image();
image1.src = "togglePlus.gif";

image2 = new Image();
image2.src = "toggleMinus.gif";


function display(x){
var elm = document.getElementById(x);
var elmImg = document.getElementById(x+"_img");
var display = elm.style.display;
if(display == 'none'){
	elm.style.display = "inline";
	elmImg.innerHTML = "<img src='toggleMinus.gif' alt='show/hide the counties'>";
}
else{
	elm.style.display = "none";
	elmImg.innerHTML = "<img src='togglePlus.gif' alt='show/hide the counties'>";
}
}// end display

function expand_all(x)
{
	for(var i = 1; i < x + 1; i++){
		var elm = document.getElementById('cat_' + i).style.display = "inline";
		var elmImg = document.getElementById('cat_' + i + '_img').innerHTML = 
		"<img src='toggleMinus.gif' alt='show/hide the counties'>";
}
}// end expand_all

function shrink_all(x)
{
	for(var i = 1; i < x + 1; i++){
		var elm = document.getElementById('cat_' + i).style.display = "none";
		var elmImg = document.getElementById('cat_' + i + '_img').innerHTML = 
		"<img src='togglePlus.gif' alt='show/hide the counties'>";
}
}// end shrink_all