function message_box(_title,_message,_button){

  if(_button != false)
  {
    _button = true;
  }
 
  var msgw,msgh,bordercolor;
  msgw=330;//pop window width
  msgh=220;//pop window height

  w = document.documentElement.clientWidth;
  h = document.documentElement.clientHeight;
  
  var left=(w/2)-(msgw/2);
  var top =(h/2)-(msgh/2);

  var msgObj=document.createElement("div")//the pop div

  msgObj.setAttribute("id","msgDiv");
  msgObj.setAttribute("align","center");
  msgObj.className = "pop-form-dialog";
  msgObj.style.left = left+"px";
  msgObj.style.top = top+"px";
  msgObj.style.width = msgw + "px";
  msgObj.style.height =msgh + "px";
  
//  var closeBtn=document.createElement("input");//the close btn
//  closeBtn.setAttribute("type","image");
//  closeBtn.setAttribute("src","images/close1.gif");
//  closeBtn.style.border = "none";
//  closeBtn.style.width = "16px";
//  closeBtn.style.height = "16px";
//  closeBtn.style.marginTop = "0px";
//  closeBtn.style.marginLeft = "77px";
//  closeBtn.style.float = "left";
//  closeBtn.onclick=closeWin;

  
  function closeWin(){
    document.body.removeChild(msgObj);//remove the pop window
  }

  document.body.appendChild(msgObj);//append the pop window
  
  var formDiv = document.createElement("DIV");
  formDiv.style.width="100%";
  formDiv.style.height="100%";
  msgObj.appendChild(formDiv);
  
  var title = document.createElement("p");
  title.className = "pop_title";
  title.innerHTML = _title;
  
  var message = document.createElement("p");
  var container = document.createElement("div");
  container.innerHTML = _message;
  message.className = "pop_message";
  message.appendChild(container);
  
  var buttons = document.createElement("p");
  buttons.className = "pop_buttons";
  var ok_button = document.createElement("a");
  ok_button.innerHTML = "OK";
  ok_button.onclick = closeWin;
  if(_button == true)
    buttons.appendChild(ok_button);
  
  formDiv.appendChild(title);
  formDiv.appendChild(message);
  formDiv.appendChild(buttons);
}