function imgOn(imgName)
{if (document.images) {document[imgName].src=eval(imgName+"on.src");}}

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

if (document.images)
{
imgn1on=new Image(); imgn1on.src="img/snav_news_over.gif";
imgn1off=new Image(); imgn1off.src="img/snav_news_off.gif";

imgn2on=new Image(); imgn2on.src="img/snav_bits_over.gif";
imgn2off=new Image(); imgn2off.src="img/snav_bits_off.gif";

imgn3on=new Image(); imgn3on.src="img/snav_presse_over.gif";
imgn3off=new Image(); imgn3off.src="img/snav_presse_off.gif";

imgn4on=new Image(); imgn4on.src="img/e_snav_press_over.gif";
imgn4off=new Image(); imgn4off.src="img/e_snav_press_off.gif";

}