SharePoint Branding Issues: Edit In Datasheet View

After you customized your MOSS page, when you tried to open a document library in datasheet view Internet Explorer freezes.

To solve this problem, find and replace this line in core.js

var lGCWindowHeight=document.documentElement.scrollHeight;

with

var lGCWindowHeight=(document.documentElement.scrollHeight>document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.documentElement.scrollHeight;