// Modify all mail links in bottom "maincontent" frame to use the "make inquiry" link's URL from topframe
function modify_maincontent_mail_links() {  
  // First, see if there is a link in top frame to a "make inquiry" form
  var topdoc = window.frames['topframe'].document;  
  var inquiry_link = "";
  for (var i = 0; i < topdoc.links.length; i++) {    
    var toplink = topdoc.links[i];
    if (toplink.href.indexOf('makeinquiry.php') >= 0) {
      // We found a link to a make inquiry form.
      inquiry_link = toplink.href;
      break;
    }    
  }  
  // Now if there was a make inquiry link, let's proceed.
  if (inquiry_link != "") {
    // Get just the URL part of the inquiry link since it is likely a javascript call.
    var startpos = inquiry_link.indexOf('http');
    var endpos = inquiry_link.indexOf("'", startpos);
    inquiry_link = inquiry_link.substr(startpos, endpos-startpos);
    // Now modify the maincontent mailto links to use this topframe inquiry link.
    var maindoc = window.frames['maincontent'].document;
    for (var j = 0; j < maindoc.links.length; j++) {    
      var mainlink = maindoc.links[j];
      if (mainlink.protocol == 'mailto:') {
        // Found a mail link. Modify it
        var mailto_addy = mainlink.href.substr(7) // Strip out the "mailto:" part
        var mailto_url = unescape(inquiry_link + '&a=' + mailto_addy); 
        mainlink.href = mailto_url;
        mainlink.target = '_blank';
        mainlink.innerText = 'Send E-mail';
      }    
    }
  }
}