var sSelectednav="";
function navigationROLL(sNavID,sAction){
	if(document.getElementById){
		oNavimage=document.getElementById("nav."+sNavID);
		if(oNavimage){
			if (sNavID !=sSelectednav){
				oNavimage.src="images/navimages/"+sNavID+"-"+sAction+".jpg";
			}
		}
	}
}
function setnavigation(sNavID){
navigationROLL(sNavID,'over');
sSelectednav=sNavID;

}