var imgArray = new Array();

function do_nothing()
{
	//needed to stop IE problem
}

function pre_cache(urls)
{	
	var argv = pre_cache.arguments;
  	var argc = argv.length;
  	for (var i = 0; i < argc; i++) 
  	{
		img = new Image(259,259);
		img.src = argv[i];
		imgArray = imgArray.concat(img.src);
		//alert(argv[i]);
  	}
  	
  	/*
  	alert("length = ");
  	alert(imgArray.length);
  	for (var i = 0; i < imgArray.length; i++)
  	{
  		alert(imgArray[i]);
  	}
  	*/
}

//change the image based on colour chart selection
function click_selected(num)
{
	document.prod_options.colour_id.selectedIndex = num;
	change_selected();
}

//change the image based on dropdown menu selection
function change_selected()
{
	change_image(imgArray[document.prod_options.colour_id.selectedIndex]);
}

function change_image(url)
{
	document.img_change.src = url;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}