function QueryParser(q) {
  if(q.length > 1){
    this.q = q.substring(1, q.length);
  }
  else {
    this.q = null;
  }

  this.keyValuePairs = new Array();

  if(this.q) {
    for(var i=0; i < this.q.split("&").length; i++) {
      this.keyValuePairs[i] = this.q.split("&")[i];
    }
  }

  this.getKeyValuePairs = function() {
    return this.keyValuePairs;
  }

  this.getValue = function(key) {
    for(var i=0; i < this.keyValuePairs.length; i++) {
      if(this.keyValuePairs[i].split("=")[0] == key){
        return this.keyValuePairs[i].split("=")[1];
      }
    }
    return "";
  }

  this.getParameters = function() {
    var a = new Array(this.getLength());
    for(var i=0; i < this.keyValuePairs.length; i++) {
      a[i] = this.keyValuePairs[i].split("=")[0];
    }
    return a;
  }

  this.getLength = function() {
    return this.keyValuePairs.length;
  }
}

var parser = new QueryParser(window.location.search);