function showColor(currentNod){
	var span_node = document.getElementById(currentNod)
	span_node.style.backgroundImage="url(http://www.technobasalt.com/images/bgmenuselect.gif)";
}
function restoreBg(currentNod){
	var span_node = document.getElementById(currentNod)
	span_node.style.backgroundImage="url(http://www.technobasalt.com/images/bgmenubody.gif)";
}