I am having a aspx page,in which there is a Select box control
<select name="selViewPerPage" id="selViewPerPage" style="width:30px">
In order to bring a particular style in all browsers, i am replacing this html control with dynamic select box using "selectBox.js" . Now the problem is , i am having two dropdowns in the page ,during runtime they are generated with same class name without any ids.So while trying to position the controls using css,the both drop downs takes the same position. 
So i am not sure ,how to handle this situation .Please let me know,if you need more information.
Thnks