// getstats.js
//
//   Unobtrustively and transparently collect client-side statistics
//   that aren't captured in server logs
//
// Copyright (c) 2001  Keith M. Swartz, kswartz26@yahoo.com
// Updates: 25 Apr 2001 16:41:47
//           Added Netscape 6 support
//          15 Jun 2001 15:53:03
//           Now uses cookies so stats are per-user i/o per-visit.

function getCookie() {
  var dc=document.cookie;
  var cookieStart=document.cookie.indexOf("oneroadvisit=");
  if (cookieStart<0) {
    // Cookie not set (we'll set it on the way out)
    return false;
  } else {
    // Cookie is set -- return true and exit out of entire script
    return true;
  }
  var cookieEnd=document.cookie.indexOf(";",cookieStart);
  if (cookieEnd==-1) cookieEnd=dc.length;
  return document.cookie.substring(cookieStart,cookieEnd);
}

function swapLinks() {
  if (getCookie()) {
    return true;
  }

  var i,olink,omo;
  for (i=0; i<document.links.length; i++) {
   olink=document.links[i].href;

   // Change link to invoke mySubmit routine, unless link is to JS or anchor
   if (document.links[i].href.substring(0,11)!="javascript:"
       && document.links[i].href.substring(0,1)!="#") {
    document.links[i].href="javascript:mySubmit('"+document.links[i].href+"')";

    // Now, add or update mouseover event to change statusbar. Pull out the
    // source code any existing onmouseover event and append it to the new
    // event. (Don't prepend in case existing code also alters status bar,
    // although this has some quirky behavior in NS6.)

    if (is_nav6up) {
      // We have to use DOM to get onmouseover attribute in NS6
      omo=document.links[i].getAttribute('onmouseover');
      // Also, this may not include a trailing semicolon; if not, add one
      re=/[^;]\s*$/;
      if (re.test(omo)) omo=omo+';';
    } else {
      omo=document.links[i].onmouseover;
      // This returns an anonymous function; extract just the function body
      if (omo) {
        omo=omo.toString();
	omo=omo.substring(omo.indexOf("{")+1,omo.indexOf("}"));
      } else
        omo=''; // For NS 4.04 and lower
    }

    // Define the new event to change the status bar, then do whatever we had
    document.links[i].onmouseover=new Function('status="'+olink+'";'+
                                               omo+'; return true;');
   }
  }
}

// Populate form fields and submit form (this overrides actual link, but
// the link location gets passed too, so CGI script can return that
function mySubmit(myloc) {
  document.myform.scr_w.value=screen.width;
  document.myform.scr_h.value=screen.height;
  document.myform.redir.value=myloc;
  document.myform.win_w.value = ((is_ie)?document.body.clientWidth:window.innerWidth);
  document.myform.win_h.value = ((is_ie)?document.body.clientHeight:window.innerHeight);
  document.myform.col_dp.value = screen.colorDepth;

  // Browser type/version (extracted from full agent string)
  var myagent="";
  if (is_nav)
    myagent = "Netscape "+is_minor;
  else if (is_ie)
    myagent = "MSIE "+is_iever;
  else if (is_opera)
    myagent = "Opera "+is_minor;
  else if (is_webtv)
    myagent = "WebTV "+is_minor; // ?
  else
    myagent = "Unknown ";
  if (is_win)
    myagent += "/Win";
  else if (is_mac)
    myagent += "/Mac";
  else
    myagent += "/Other";

  // Set cookie so we don't come back here next time
  Today=new Date(); 
  document.cookie="oneroadvisit="+Today.toUTCString()+
                  "; expires=Wednesday, 31-Dec-02 23:59:59 GMT";

  document.myform.agent.value = myagent;
  document.myform.submit();
}