var t
function showCat (cat){
	
	if (!document.getElementById){
		return;
	}
	
	var catview = document.getElementById("catview")	
	var img = document.getElementById("cat")
    var src = "images/catalogue/collection/" + cat + ".jpg";
	if (img.src.indexOf(src) == -1){
         img.src = src; + "?nocache=" + new Date().getTime();
		t = setInterval(displayCat, 500);
	}else{ 
	   hideCat();     	   
	}	
}

function hideCat(){
	if (!document.getElementById){
		return;
	}
	var catview = document.getElementById("catview")
	catview.style.display = "none";	
	var img = document.getElementById("cat")
	img.src = "images/spacer.gif"
}
function displayCat(){
	var img = document.getElementById("cat");
	if (img.readyState != "uninitialized"){
		var catview = document.getElementById("catview")
		catview.style.display = "block";
		clearInterval(t);	
	}
}