<html>
<body>
<script type="text/javascript">
function getcube()
{
var number=document.getElementById("number").value;
alert(number*number*number);
}
</script>
<form>
Enter No:
<input type="text" id="number" name="number"/><br/>
<input type="button" value="cube" onclick="getcube()"/>
</form>
</body>
</html>
Here, the document.getElementById() method returns the element of specified id.
<body>
<script type="text/javascript">
function getcube()
{
var number=document.getElementById("number").value;
alert(number*number*number);
}
</script>
<form>
Enter No:
<input type="text" id="number" name="number"/><br/>
<input type="button" value="cube" onclick="getcube()"/>
</form>
</body>
</html>
Here, the document.getElementById() method returns the element of specified id.
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