      <!--
      var changeable=1;
      if((navigator.appName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion) < 4))
      {
        changeable=0
      }
	  function Show_Sublevel(name)
      {
        if (changeable == 1) {
						document.getElementById("p1_lvl_2").style.visibility ="hidden";
						document.getElementById("p2_lvl_2").style.visibility ="hidden";
						document.getElementById("p3_lvl_2").style.visibility ="hidden";
						document.getElementById("p4_lvl_2").style.visibility ="hidden";
						document.getElementById("p5_lvl_2").style.visibility ="hidden";
						document.getElementById("p6_lvl_2").style.visibility ="hidden";
						document.getElementById("p7_lvl_2").style.visibility ="hidden";
						document.getElementById("p8_lvl_2").style.visibility ="hidden";
            switch (name) {
              case "p1_but" :	document.getElementById("p1_lvl_2").style.visibility = "visible"; 
								break;
              case "p2_but" :	document.getElementById("p2_lvl_2").style.visibility = "visible"; 
								break;											
              case "p3_but" :	document.getElementById("p3_lvl_2").style.visibility = "visible"; 
								break;											
              case "p4_but" :	document.getElementById("p4_lvl_2").style.visibility = "visible"; 
								break;											
              case "p5_but" :	document.getElementById("p5_lvl_2").style.visibility = "visible"; 
							 	break;
              case "p6_but" :	document.getElementById("p6_lvl_2").style.visibility = "visible"; 
								break;											
              case "p7_but" :	document.getElementById("p7_lvl_2").style.visibility = "visible"; 
								break;											
              case "p8_but" :	document.getElementById("p8_lvl_2").style.visibility = "visible"; 
								break;											
			}
        }
      }  
      //->