if (document.images)
{
	tab1on = new Image(24, 130);
	tab1on.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_files_hover.gif";
	tab1off = new Image(24, 130);
	tab1off.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_files.gif";

	tab2on = new Image(24, 130);
	tab2on.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_kaart_hover.gif";
	tab2off = new Image(24, 130);
	tab2off.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_kaart.gif";

	tab3on = new Image(24, 130);
	tab3on.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_routeplanner_hover.gif";
	tab3off = new Image(24, 130);
	tab3off.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_routeplanner.gif";
	
	tab4on = new Image(24, 130);
	tab4on.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_uitleg_hover.gif";
	tab4off = new Image(24, 130);
	tab4off.src ="http://www.viacontent.nl/traphic_images/images/tabs/tab_uitleg.gif";
}

function lightup(imgName)
{
	if (document.images)
	{
		imgOn=eval(imgName + "on.src");
		document.getElementById(imgName).src = imgOn;

		//document[imgName].src= imgOn;
	}
}

function turnoff(imgName)
{
	if (document.images)
	{
		imgOff=eval(imgName + "off.src");
		document.getElementById(imgName).src = imgOff;

		//document[imgName].src= imgOff;
	}
}