function showhide(id){
	if (document.getElementById){
		obj = document.getElementById(id);
			if (obj.style.display == "none"){
				obj.style.display = "";
			} 
			else {
		obj.style.display = "none";
		}
	}
} 

//Preload image
var img1 = new Image();
var img2 = new Image();
img1.src = '/shared/images/plusSigns/treePlus_orange.gif'; //pic1 image path here
img2.src = '/shared/images/plusSigns/treeMinus_orange.gif'; //pic2 image path here

function ViewOneOrTheOther(id) {
	if (document.getElementById){
		var imgSrc = document.getElementById(id).src
		document.getElementById(id).src = (imgSrc == img1.src) ? img2.src : img1.src;
	}
}