Table headers inside main table header in HTML

[goaltyMoolleyhy]

Hi there how can I achieve this kind of table

Inside the Schedule column, there are sub columns (jan, feb and so on).I tried \[code\]<th></th>\[/code\] inside a \[code\]<th></th>\[/code\]But it is not working.See my fiddle: http://jsfiddle.net/TAJzY/1/