Q:

SharePoint 2007 navigation and removing its delay

In SharePoint 2007, there's a top nav that the user can hover over, which reveals a dropdown menu of subitems.  When they remove their mouse from the dropdown, it disappears, but only after a short delay.  This can cause problems, as if people are trying to click a link on the page somewhere, but the nav menu hasn't hidden itself yet, they'll accidentally click it instead.  This is compounded with the fact that the menu appearing in the first place is delayed as well, so right before they mouse over the link on the page they actually want to click, the menu will suddenly appear and intercept their click when they weren't meaning to. 
I've poked at core.js at some suspect areas, but can't seem to nail it down.  Any thoughts? 

A:

This is the normal behaviour of SharePoint.  This control is the asp:Menu control of ASP.Net 2.0 and the only thing you can do is customized the MasterPage or the DefaultPage of your Site. 
If you change the core.js file of "layouts" folder you'll lose Microsoft support, so take care about change any of the file from this folder. 
I recommend that you modify the existent control or create a new one and put it in this position of the MasterPage.