<input id='cnumber' type='text' maxlength='11' name='cnumber' value=''> <button type='button' name='ttbutton' size='12' onclick='document.location="http://www.maerskline.com/appmanager/?_nfpb=true&portlet_trackSimple_1_actionOverride=%2Fportlets%2Ftracking3%2Ftrack%2FtrackSimple%2FtrackSimple&_windowLabel=portlet_trackSimple_1&_pageLabel=page_tracking3_trackSimple&portlet_trackSimple_1{pageFlow.track"+document.getElementById("cnumber").value'>Track container</button>