How to set scroll of UIWebView in phone gap?

Iam using Phone gap For developing Cross platform mobile application i just started it but i try to fixed the scroll of UIWebView its not wo开发者_JAVA百科rking i try it through CSS

<style type="text/css">
html {height:250;}
body {height:250;}
</style> 

document.ontouchmove = function(e){ e.preventDefault()};

this code Works For me :)