Remember a Div's Scroll Position
A person asked the question on how to remember a div's scroll position on the page when the comes back to the page. It is rather easy to do and it involves a session cookie to remember the position. Yeah, the cookie part could be done better so do not comment on that! I went the easy route!
<html>
<head>
<title>Fun Scroll</title>
<style type="text/css">
#divTest{width:150px;height:200px;overflow:auto}
</style>
<script type="text/javascript">
window.onload = function(){
var strCook = document.cookie;
if(strCook.indexOf("!~")!=0){
var intS = strCook.indexOf("!~");
var intE = strCook.indexOf("~!");
var strPos = strCook.substring(intS+2,intE);
document.getElementById("divTest").scrollTop = strPos;
}
}
function SetDivPosition(){
var intY = document.getElementById("divTest").scrollTop;
document.title = intY;
document.cookie = "yPos=!~" + intY + "~!";
}
</script>
</head>
<body>
<div id="divTest" onscroll="SetDivPosition()">
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
ERIC<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>1<br/>
</div>
</body>
</html>
Hope it helps,
Eric Pascarello
Moderator of HTML/JavaScript at www.JavaRanch.com
Author of: JavaScript: Your Visual Blueprint for Dynamic Web Pages
Co-Author of Ajax In Action
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Posted by pascarello on July 18, 2005 12:55:16 PM EST