var revert = new Array();
var inames = new Array('Hometab','Articlestab','Reviewstab','Specialtab','Helptab','Newstab');

// Preload
if (document.images) 
{
	var flipped = new Array();
  	for(i=0; i< inames.length; i++) 
	{
    		flipped[i] = new Image();
		flipped[i].src = "http://www.bestrouter.co.uk/images/"+inames[i]+"high.png";
	}
}

function highlight(num) 
{
	if(document.images) 
	{
    		revert[num] = document.images[inames[num]].src;
		document.images[inames[num]].src = flipped[num].src;
	}
}

function unhighlight(num) 
{
	if(document.images) document.images[inames[num]].src = revert[num];
}