Lab 5 Assignment 2 (javascript)

<!DOCTYPE html>
<html>
<head>
    <title>by Fakher_Aldeen Odeh</title>
    <script type="text/javascript">

window.onload = function(){


document.getElementById('cli').onclick = function(){


var random = Math.floor(Math.random()*(8-2)+2);
var text1 = parseInt(document.getElementById('b').value);

var sum = 1;

        for(var i = 1;i<=random;i++){
            sum*=text1;
        }


document.getElementById('res').innerHTML = "The result is : " + sum;
document.getElementById('rand').innerHTML ="Generated random : " +  random;


}


}


    </script>
</head>
<body>


Type a number : <input type="text" name="t" id="b" />
<input type="button" name="b" id="cli" value="click"/><br>

<b id="res"></b>
<b id="rand"></b>


</body>
</html>