<html>
<body>
<script language="JScript">
function function1() {
myDiv.style.setExpression("height","eval(myDiv.innerHTML)");
}
function function2() {
alert(myDiv.style.getExpression("height"));
}
function function3() {
alert(myDiv.style.removeExpression("height"));
}
function function4() {
myDiv.innerHTML = 100;
document.recalc();
}
</script>
<button onclick="function1();">Set expression</button>
<button onclick="function2();">Get expression</button>
<button onclick="function3();">Remove expression</button>
<button onclick="function4();">Recalc</button>
<div id="myDiv" style="height:300; width:200; border:solid 1px black">20</div>
</body>
</html>