Dialog Modal in SharePoint 2013

function OpenPopUpPage(url, callback, width, height)
#
function OpenPopUpPageWithTitle(url, callback, width, height, title)
#
function OpenPopUpPageWithDialogOptions(dialogOptions)
E.g.,
 <a href="javascript:OpenPopUpPageWithTitle('http://example.com/Pages/another.aspx',null,null,null,'Advanced Search - Tips');">Advanced Search Tips</a>


Reference:
http://wp.ahcheng.com/2013/04/09/calling-dialog-modal-form-in-sharepoint-2013/