javascript解决中文传递乱码和特殊字符问题

function btnPrint_onclick() 
{
   var dnd = $get('<%=ddlstBynj.ClientID%>');
   var dndIndex=dnd.selectedIndex;
   if(dndIndex==0)
   {
     var nd="";
   }
   else
   {
      var nd=dnd.options[dndIndex].text;
   }
   var str = $get('<%=hfdQeuryCondition.ClientID%>').value;
   var strWhere=str.replace(/(%)/g,"|^!|");
   openwindow("StuGraduationStatRPT.aspx?strWhere="+encodeURIComponent(strWhere)+"&nd="+encodeURIComponent

(nd),null,800,600);
}
</script