js网页提示层带关闭功能按钮

2016-09-11 网页编程网 网页编程网

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>可关闭和拖动的提示层</title>
</head>
<style>

</style>
<body bgcolor="#FFFFFF">
<div id="postit" style="left:150px;top:150px">
<div align="right"><b><a href="javascript:closeit()">[关闭]</a></b></div>
<b>this is the content</b><br>
</div>
<script>
var once_per_browser=0
var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all
if (ns4)
crossobj=document.layers.postit
else if (ie4||ns6)
crossobj=ns6? document.getElementById("postit") : document.all.postit
function closeit(){
if (ie4||ns6)
crossobj.style.visibility="hidden"
else if (ns4)
crossobj.visibility="hide"
}
function get_cookie4(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie4.length > 0) {
    offset = document.cookie4.indexOf(search)
    if (offset != -1) { // if cookie4 exists
      offset += search.length
      // set index of beginning of value
      end = document.cookie4.indexOf(";", offset);
      // set index of end of cookie4 value
      if (end == -1)
         end = document.cookie4.length;
      returnvalue=unescape(document.cookie4.substring(offset, end))
      }
   }
  return returnvalue;
}
function showornot(){
if (get_cookie4('postdisplay')==''){
showit()
document.cookie4="postdisplay=yes"
}
}
function showit(){
if (ie4||ns6)
crossobj.style.visibility="visible"
else if (ns4)
crossobj.visibility="show"
}
if (once_per_browser)
showornot()
else
showit()
</script>
<script language="JavaScript1.2">
//drag drop function for ie4+ and NS6////
/////////////////////////////////
function drag_drop(e){
if (ie4&&dragapproved){
crossobj.style.left=tempx+event.clientX-offsetx
crossobj.style.top=tempy+event.clientY-offsety
return false
}
else if (ns6&&dragapproved){
crossobj.style.left=tempx+e.clientX-offsetx
crossobj.style.top=tempy+e.clientY-offsety
return false
}
}
function initializedrag(e){
if (ie4&&event.srcElement.id=="postit"||ns6&&e.target.id=="postit"){
offsetx=ie4? event.clientX : e.clientX
offsety=ie4? event.clientY : e.clientY
tempx=parseInt(crossobj.style.left)
tempy=parseInt(crossobj.style.top)
dragapproved=true
document.onmousemove=drag_drop
}
}
document.onmousedown=initializedrag
document.onmouseup=new Function("dragapproved=false")
</script>

</body>
</html>

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