Mit JavaScript Get Parameter aus der URL auslesen

function getUrlVars()
/* get GET Vars from URl */
{
    var vars = [], hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}

For example, if you have the URL:

http://www.example.com/?me=myValue&name2=SomeOtherValue This code will return:

{
   "me"    : "myValue",
   "name2" : "SomeOtherValue"
}

and you can do:

var me = getUrlVars()["me"];
var name2 = getUrlVars()["name2"];

Nützlich auch hier:

if (typeof variable === 'undefined') {
   // variable is undefined
}