Drop Down List Expanded Not Visible

 Hello all...
I have a drop down list with set width on a form...I bind some data in it... and when expanded at runtime in mozzila everything looks great because the width of the expanded list is the width of the longest row of data in it, but when I use internet explorer the width of the expanded list is the same with the width of the drop down list, and some data are no readable.
 
Is there any way to change that without changing the width of the drop down list???
 
Thanks

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