function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//透明度
var speed = 50;         //閫熷害
var max_opacity = 100;   //鏈€澶?
var min_opacity = 50; //鏈€灏?
var do_step   =   5;       //鍙樺寲鐨勫箙搴?

function change_opacity(obj,do_option)
{
   if(obj.doing)
    clearInterval(obj.doing);
   obj.doing = setInterval(do_option+"_alpha("+obj.sourceIndex+")",speed); 
}


function down_alpha(obj_index)
{
   var obj = document.all[obj_index];
  
   if(obj.filters.Alpha.Opacity > min_opacity )
   {
    obj.filters.Alpha.Opacity += -do_step;
   } 
   else
   { 
    clearInterval(obj.doing);
    obj.filters.Alpha.Opacity = min_opacity;
    obj.doing = false;
   } 
} 
function up_alpha(obj_index)
{
   var obj = document.all[obj_index];
  
   if(obj.filters.Alpha.Opacity<max_opacity)
    obj.filters.Alpha.Opacity += do_step;
   else
   { 
    clearInterval(obj.doing);
    obj.filters.Alpha.Opacity = max_opacity;
    obj.doing = false;
   } 
}