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) //v4.0
{ 
	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 && document.getElementById) x = document.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];
		}
	}
}

MM_preloadImages('images/b_cart2.gif','images/b_account2.gif','images/b_tracking2.gif','images/b_invoice2.gif','images/b_register2.gif')