Q:

why does isAlphaNumeric javascript function works on Chrome but fails in IE 10?

I need html input which allows only alphanumeric chars. Here is my input
<input type="text" id="l1t1r1c1" onkeypress="javascript:return isAlphaNumeric(event,this.value);" maxlength="5" onkeyup="this.value = minmax(this.value, 0, 99.99, this)">

isAlphaNumeric javascript function works on Chrome but fails in IE 10. How can I run this function in IE10?
here is my function
function isAlphaNumeric(e) { // Alphanumeric only
            var k;
            document.all ? k = e.keycode : k = e.which;
            return ((k > 47 && k < 58) || k == 46 || k == 0);
        };

THX.

A:

Syntax error. It is keyCode not keycode
function isAlphaNumeric(e) { // Alphanumeric only
        var k;
        document.all ? k = e.keyCode : k = e.which;
        return ((k > 47 && k < 58) || k == 46 || k == 0);
    }

DEMO

