function mouse_over_left_navi(key,color){  
    	if (document.layers) //NC 4.x
       	 window.document.layers[key].bgColor = color;
    	else if (document.all) //IE
       	 window.document.all[key].style.background =color;
       else	 // IE 6 +NC 6       
       	document.getElementById(key).setAttribute("bgcolor",color);
  }