if (document.images)
{
	interactive_off = new Image(131,30);
	interactive_off.src = "../../images/nav/top_interactive1.gif";
	interactive_on = new Image(131,30);
	interactive_on.src = "../../images/nav/top_interactive2.gif";

	development_off = new Image(137,30);
	development_off.src = "../../images/nav/top_devel1.gif";
	development_on = new Image(137,30);
	development_on.src = "../../images/nav/top_devel2.gif";

	design_off = new Image(142,30);
	design_off.src = "../../images/nav/top_design1.gif";
	design_on = new Image(142,30);
	design_on.src = "../../images/nav/top_design2.gif";

	aboutus_off = new Image(138,30);
	aboutus_off.src = "../../images/nav/top_aboutus1.gif";
	aboutus_on = new Image(138,30);
	aboutus_on.src = "../../images/nav/top_aboutus2.gif";
}
              
function activate(imgName)
{
	if (document.images)
  		{
  			imgOn = eval(imgName + "_on.src");
  			document [imgName].src = imgOn;
		}
}

function inactivate(imgName)
{
	if (document.images)
	{
		imgOff = eval(imgName + "_off.src");
		document [imgName].src = imgOff;
	}
}