<!--
  function chg_img (img_name,img_src) {
    document[img_name].src=img_src;
  }
  
  function ShowMenu (npr1,npr2,nid1,nid2) {
    var pr1 = document.getElementById(npr1);
    var pr2 = document.getElementById(npr2);
    var id1 = document.getElementById(nid1);
    var id2 = document.getElementById(nid2);
    if (pr1.className == "menu_off") {
      pr1.className = "menu_on";
      id1.className = "submenu_on";
      if (pr2.className == "menu_on") {
      	pr2.className = "menu_off";
      	id2.className = "submenu_off";
    	}
    }
    else {
	   	pr1.className = "menu_off";
     	id1.className = "submenu_off";
   	}
  }
  
  function docval (npr) {
    var pr = document.getElementById(npr);
    if (pr.className == "menu_off") {
      return "_off";
    }
    else {
      return "_on";
    }
  }
  
-->