//How to Show a section using JavaScript?
Xrm.Page.ui.tabs.get(tabNumber).sections.get(sectionNumber).setVisible(true);
//How to Hide a section using JavaScript?
Xrm.Page.ui.tabs.get(tabNumber).sections.get(sectionNumber).setVisible(false);
**For CRM 2011 Training, please check out our CRM Training page. Please share |Like in Facebook if you feel like this page is useful.