JavaScript Extremely Fast Changing URL

$(document).ready(function() {
   startLoop();
});
var iFrequency = 50;
var myInterval = 0;
function startLoop() {
    if(myInterval > 0) clearInterval(myInterval);
    myInterval = setInterval("doSomething()", iFrequency );
}
function doSomething()
{
    history.pushState(null, null, makeid());
}
function makeid()
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789#+-$£@++++";

    for( var i=0; i < 30; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return 'hack.exe?&$hackingprogress:#' + text + '$progress#100%#complete';
}