js实现复制功能

   out.println("<script language='javascript'>");
   out.println("try{window.clipboardData.setData('text', '"+req_id+"');}catch (e) {}");//复制值
   out.print("alert('"+ss+"');");
   out.println("window.location.href='ysq_apply.jsp';");
   out.println("</script>");