var timename_topwin;

function showDetail() {
//背景
  var bgObj=document.getElementById("bgDiv");
  bgObj.style.width = document.body.offsetWidth + "px";
  bgObj.style.height = screen.height + "px";

//定义窗口
  var msgObj=document.getElementById("msgDiv");
  //msgObj.style.marginTop = -75 +  document.documentElement.scrollTop + "px";

  initFloatTips_tw();
  
//关闭
  document.getElementById("msgShut").onclick = function(){
	    //clearTimeout(timename_topwin);
  		bgObj.style.display = msgObj.style.display = "none";
  }
  msgObj.style.display = bgObj.style.display = "block";
}


var tips_tw; var theTop_tw = 150/*这是默认高度,越大越往下*/; var old_tw = theTop_tw;
function initFloatTips_tw() {
  tips_tw = document.getElementById('msgDiv');
  moveTips_tw();
};
function moveTips_tw() {
  var tt=50;
  if (window.innerHeight) {
    pos = window.pageYOffset
  }
  else if (document.documentElement && document.documentElement.scrollTop) {
    pos = document.documentElement.scrollTop
  }
  else if (document.body) {
    pos = document.body.scrollTop;
  }

  pos=pos-tips_tw.offsetTop+theTop_tw;
  pos=tips_tw.offsetTop+pos/10;
	//alert(pos +"_"+ old_tw);
  if (pos < theTop_tw) pos = theTop_tw;
  if (pos != old_tw) {
    tips_tw.style.top = pos+"px";
    tt=10;
  }
	
  old_tw = pos;
  timename_topwin=setTimeout(moveTips_tw,tt);
}
//!]]>