Decompose a bitmask into bits

Introduction

I use bitmasks far less than I used to, but when I do use them I often have the need to decompose a value into its parts.

The BitDemaskerer

Enter a bitmask   Decimal Hexadecimal

This decomposes to: 0

The Code

Super simple:

Enter a bitmask   
Decimal
Hexadecimal


This decomposes to: 0

<script type="text/javascript">
    function GetBits() {
		var hex = document.getElementById("Hex").checked;
        var elm = document.getElementById("bitmask");
        var value = parseInt(elm.value);
        if (isNaN(value))
            result.innerHTML = "Not a number";
        else {
            result.innerHTML = "";
            for (var i = 1; i <= value; i = i * 2)
                if ((value & i) > 0)
				{
					var bitRepresentation = hex? "0x" + i.toString(16) : i.toString();
                    result.innerHTML += (result.innerHTML == "" ? "" : ", ") + bitRepresentation;
				}
        }
    }
</script>