Please try to download the patch from
http://www.jeasyui.com/download/downloads/jquery-easyui-1.4.4-patch.zip.
When defining columns, you can assign a 'id' property that allows you access that header cell.
columns:[
[
{id:'c1',field:'typ',title:'Typ',width:50,rowspan:2},
{id:'c2',field:'datum',title:'Datum',width:100,rowspan:2},
{id:'c3',title:'Auftrag',colspan:2},
...
],
[
{field:'design',title:'ARCH-Design',width:100},
{field:'ep',title:'ARCH-EP',width:100},
...
]
]
To get the 'Auftrag' header cell, please try this code:
var td = $('#c3');
var cell = td.children('.datagrid-cell');