Get query string variable

get-var.js

function getQueryVariable (variable) {

    var query = window.location.search.substring(1);
    var vars = query.split("&");

    for (var i=0;i<vars.length;i++) {

        var pair = vars[i].split("=");

        if (pair[0] == variable) {return pair[1];}
    }

    return(false);
}