How to Shrink SharePoint content database size?

Run following SQL command to free up space of sharepoint content database

dbcc shrinkdatabase(WSSContentDatabaseName)

How to Hide Fields in SharePoint List Form Pages using jQuery

Yesterday, one of friend ask me can we show/hide fields in Newform.aspx and Editform.aspx by clicking on checkbox. It can be done thru sharepoint designer with some rules. But I used jQuery with few lines of code in Task List. I added 1 more field i.e. ShowFields as choice field.

Then I added a content editor webpart on newform.aspx. MOSS wont allow to edit newform.aspx and editform.aspx. To add webpart on newforn.aspx / editform.aspx, add in &ToolPaneView=2 on the end of the url. So your url for newform.aspx will be http://portal/Lists/Tasks/NewForm.aspx?RootFolder=%2FLists%2FTasks&Source=http%3A%2F%2Fportal%2FLists%2FTasks%2FAllItems%2Easpx&ToolPaneView=2

In source editor of content editor web part, I have added following script

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>

<script>
$(document).ready(function()
{
$("input[title$='ShowFields']").click(function()
{
$("input[title$='Title']").parent('span').parent('td').parent('tr').toggle();
$("nobr:contains('Start Date')").parent('h3').parent('td').parent('tr').toggle();
$("nobr:contains('Due Date')").parent('h3').parent('td').parent('tr').toggle();
});
});
</script>

and close the webpart page. Then open newform.aspx, now whenever I click on Showfields Checkbox then Title/Start Date/Due Date fields are hidden, once I uncheck this it shows the fields again.