javascriptのsleep実現方法

<SCRIPT LANGUAGE="JavaScript">

function Sleep(obj,iMinSecond)
{
   if (window.eventList==null)
   window.eventList=new Array();
   var ind=-1;
   for (var i=0;i<window.eventList.length;i++)
   {  
    if (window.eventList[i]==null)
    {
     window.eventList[i]=obj;   
     ind=i;  
     break;  
    }
   }
   if (ind==-1)
   {  
    ind=window.eventList.length;  
    window.eventList[ind]=obj;
   }
   setTimeout("GoOn(" + ind + ")",iMinSecond);
}
function GoOn(ind)
{
   var obj=window.eventList[ind];
   window.eventList[ind]=null;
   if (obj.NextStep) obj.NextStep();
   else obj();
}


function Test()
{
   alert("sleep");
   Sleep(this,10000);
   this.NextStep=function()
   {
   alert("continue");
   }
}

Test();

</SCRIPT>