<html>
<head>
<script>
function getComboBoxValue()
{
var course=document.getElementById("courseId").value;
alert("Course Selected:"+course);
}
</script>
<body><center>
<select id="courseId" onchange="getComboBoxValue()">
<option value="bca">BCA</option>
<option value="mca">MCA</option>
<option value="be">BE</option>
</select><center>
</body>
</html>