如何在css / asp.net中正确对齐按钮？

I'm trying to align 2 sets of buttons to the panel in the div above. The buttons called but1, but2 for the left panel. The others are but1, but2, but3 right panel. At the moment the buttons are in a straight line under the 2 panels. So I would like the 2 left buttons right under the left panel aligned left. The 2 right buttons right under the right panel align left?I'm trying to align 2 sets of buttons to the pa