function getvars(searchVar) {
  var searchString = document.location.search;
  searchString = searchString.substring(1);
  var nvPairs = searchString.split("&");
  var get = new Array;
  for (i = 0; i < nvPairs.length; i++) {
    var nvPair = nvPairs[i].split("=");
    var name = nvPair[0];
    var value = nvPair[1];
    if(name == searchVar) {
      return value;
    }
  }
}