javascript, a function for creating psuedo guid-like strings.

PsudeoGUID

function guid()
{
    var guidTemplate = 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx';

    var guid = guidTemplate.replace(/[xy]/g, function (c)
    {
        var r = Math.random() * 16 | 0;
        var v = c == 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });

    return guid;
};