Hide/Show Section in CRM 2011

For Hide:
var tabctrl=Xrm.Page.ui.tabs.get("tabname");

if(tabctrl && tabctrl.sections.get("section name"))
{
tabctrl.sections.get("section name").setVisible(false);
}


For Show:
var tabctrl=Xrm.Page.ui.tabs.get("tabname");

if(tabctrl && tabctrl.sections.get("section name"))
{
tabctrl.sections.get("section name").setVisible(true);
}