<html>
<head>
<script type="text/javascript">
function setMinWidth()
{
document.getElementById("p1").style.minWidth="1000px";
}
</script>
</head>
<body>
<p id="p1">This is some text. This is some text. This is some text.
This is some text. This is some text. This is some text.
This is some text. This is some text. This is some text.</p>
<input type="button" onclick="setMinWidth()" value="Set min width" />
</body>
</html>