css function fail when register function to object prototype

[[email protected]…]

I register this function to the Object prototype:

Object.prototype.length = function () {
    var length = 0;
    for (var i in this) length++;
    return length - 1;
};

when i use the css function, it runs this line:

name = name.replace(rupper, "-$1").toLowerCase();

but the variable 'name' is the 'length' function(above), not a string.

[ajpiano]

Sorry, we just don't support that. ​http://docs.jquery.com/Won%27t_Fix#Object.prototype_Issues