x
 
<html>
<head>
<script type="text/javascript">
function changeCursor()
{
document.body.style.cursor="crosshair";
document.getElementById("p1").style.cursor="text";
}
</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="changeCursor()" value="Change cursor" />
</body>
</html>