How to make the height jQuery tabs content 800 px?

I'm using this jquery ui tabs plugin,the content of each tab is an <iframe>:

<p><iframe src="xxx.php" style="width: 100%; height: 100%;"></iframe></p>

However the height of the tab content is about 400px,how can I make it 开发者_StackOverflow社区800px so that the scroll bar of <iframe> can disappear?

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Is there a reason you couldn't specify that the height of the iframe is 800px? i.e.

<p><iframe src="xxx.php" style="width: 100%; height: 800px;"></iframe></p>