jQuery that reports on the start of all links on a page.

check_links.js

var numCalls = 0;
var numErrors = 0;
var numSuccess = 0;
var numExternal = 0;

var errorPages = [];
var externalPages = [];

var done = function(){
  numCalls--;
  if(numCalls==0){
    var msg = "";
    msg+="NUM SUCCESS: "+numSuccess+"\n\n";
    msg+="NUM ERRORS:  "+numErrors+"\n";
    msg+=getPages(errorPages);
    msg+="NUM EXTERNAL PAGES: "+numExternal+"\n";
    msg+=getPages(externalPages);
    alert(msg);
  }
}

var statusUpdate = function(){ 
  if(numCalls>0){ 
    console.log("NUM CALLS: "+numCalls);
    setTimeout(statusUpdate, 1000);
  }
}

var getPages = function(pages){
  var out = "";
  for(var i=0; i<pages.length; i++){
   out+=pages[i]+"\n";
  }

  out+="\n";
  
  return out;
}

var links = $("a").each(function(i, item){
  var url = $(item).attr("href");
  if(url!="#" && url != document.location.pathname){
    numCalls++;
    $.ajax({
      url: url,
      success: function(data){
        numSuccess++;
        done();
      },
      error: function(jq, status, error){
        if(error!=""){
          numErrors++;
          errorPages[errorPages.length] = url;
        }
        else{
          numExternal++;
          externalPages[externalPages.length] = url;
        }
        done();
      }
    });
  }
});

statusUpdate();