var acrobat_detection = function()
{ 
  var browser_info = { acrobat : null, acrobat_ver : null};
  try {
    if($.browser.msie)
    {          
      var control = null;
      try { control = new ActiveXObject('AcroPDF.PDF'); } catch (e){}   
      if (!control) { try { control = new ActiveXObject('PDF.PdfCtrl');} catch (e) {} }   
      if(!control) {       
        browser_info.acrobat == null;
        return browser_info;  
      }
      version = control.GetVersions().split(',');
      version = version[0].split('=');
      browser_info.acrobat = "Installeret";
      browser_info.acrobat_ver = parseFloat(version[1]);                
    }
    else if($.browser.name == "chrome")
    {
      for(key in navigator.plugins)
      {
        if(navigator.plugins[key].name == "Chrome PDF Viewer" || navigator.plugins[key].name == "Adobe Acrobat")
        {
          browser_info.acrobat = "Installeret";
          browser_info.acrobat_ver = parseInt(navigator.plugins[key].version) || "Chome PDF Viewer";
        }
      } 
    }
    //
    // NS3+, Opera3+, IE5+ Mac, Safari (support plugin array):  check for Acrobat plugin in plugin array
    //    
    else if(navigator.plugins != null)
    {      
      var acrobat = navigator.plugins['Adobe Acrobat'];
      if(acrobat == null)
      {           
        if($.os.name == "mac") {
          browser_info.acrobat = "Installeret";
          browser_info.acrobat_ver = "Apple Preview"
        }
        return browser_info;
      }
      browser_info.acrobat = "Installeret";
      browser_info.acrobat_ver = parseInt(acrobat.version[0]);                   
    }
  }
  catch(e)
  {
    browser_info.acrobat_ver = null;
  }

  return browser_info;
}