Question

I created a webpage, and I want to access a html page’s javascript variable for R/W.

...
<script>
  var _ANYINT = 0;
  var _ANYOBJ = 0;
</script>
...

How can I read a variable?

function ReadInt(varName) : integer
   Result := webbrowser.document.all.?????????? var Name  ?????
end;

r := ReadInt('_ANYINT');

And how to write into?

Thanks:
dd

Answer 1

The HTMLWindow interface exposes an execScript function that permits the execution of javascript code inside the WebBrowser document. See http://delphi.about.com/od/adptips2006/qt/wb_execscript.htm , for example.

Unfortunately, execScript does not allow for a result be returned.

So, to access javascript data, you will need that in your javascript you write some function that puts the desired data into a hidden field in the page and then from your Delphi you access the field via WebBrowser. Here is some example code on how to do it. http://www.delphidabbler.com/articles?article=21&part=1#retval