Navigation: add check that active.url actually exists
Navigation: add check that active.url actually exists

hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,arschmitz/jquery-mobile,startxfr/jquery-mobile,hinaloe/jqm-demo-ja,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile,hinaloe/jqm-demo-ja