//This is how to Save and Close function in javascript for CRM 2011
//Save function
Xrm.Page.data.entity.save();
//Save and Close function
Xrm.Page.data.entity.save("saveandclose");
//Save and New function
Xrm.Page.data.entity.save("saveandnew");
//Close function
Xrm.Page.ui.close();