function keyboard_num(){
 try {var argv=keyboard_num.arguments;if(argv.length<2){return;}var obj=argv[0];var length=argv[1];var keycode=null;
  if(typeof(window.event)!="undefined"){var keycode=window.event.keyCode;}else if(typeof(argv[2])!="undefined"){var keycode=argv[2].which;}
  if(keycode==null){return;}
  if(keycode==86&&!detect_msie_version(7))
  {//CTRL+V
   obj.value="";var data=window.clipboardData.getData("text");data=data.toString();var regex=/^\d{0,3}\.?\d{0,2}$/;//^\d{0,5}(\.\d{0,2}){0,1}$
   if(regex.test(data)==false){window.clipboardData.setData("text","");}
   }
  //Enter:13,CTRL:17,CTRL+V:86,Backspace:8,Delete:46
  if(keycode==13||keycode==17||keycode==86||keycode==8||keycode==9||keycode==46||keycode==37||keycode==38||keycode==39||keycode==40){return true;}
  if(obj.value.length>=length){return false;}
  else if ((keycode>=48&&keycode<=57)||(keycode>=96&&keycode<=105)){return true;}
  return false;
 }catch(x){}}

//  $(function()
//  {
//    setTimeout(hideDiv,5000);
//  }
//  )
//  function hideDiv()
//  {
//    $('#div_tip').hide();
//  }