My page have an iFrame here:
here is the code of putting the iframe:\[code\]<iframe src="" name="iframe_a" scrolling="no" width="100%" frameborder="0" style="margin-top: 200px; background-color: White;" id="I1"></iframe>\[/code\]when I click any button that triggers page load, the page keeps adding more white spaces below the iFrame:
How can i prevent this kind of problem? NOTE
I'm using ASP.NET)I will appreciate all answers, advices and suggestions 
I'm using ASP.NET)I will appreciate all answers, advices and suggestions