Question

Can anyone explain this code snippet to me?

<script type="text/javascript">


  function querySt(ji) {
      hu = window.location.search.substring(1);
      gy = hu.split("&");
      for (i = 0; i < gy.length; i++) {
          ft = gy[i].split("=");
          if (ft[0] == ji) {
              return ft[1];
          }
      }
  }

  var koko = querySt("koko");

  document.write(koko);
  document.write("<br>");
  document.write(hu);

Answer 1

This is a function to extract variables from the document’s query string, e.g. if the document’s location is

example.com/test.htm?koko=123

querySt("koko") will return 123.

As a side note, the function should use local variables to prevent polluting the global name space:

var hu = window.location.search.substring(1);
var gy = hu.split("&");
...
for (var i = 0; i < gy.length; i++) {