Very basic JS script to check if ga.js or analytics.js scripts (standard implementations) are present on a page

ga.js and analytics.js presence checker

(function(){
   var myScripts = document.getElementsByTagName("script");
   var result = [];
       for(var i = 0; i < myScripts.length; i += 1){
          if(myScripts[i].src.substr(-12, 12) === "analytics.js"){
          result.push(myScripts[i].baseURI + " has analytics.js installed");
          }
          else if(myScripts[i].src.substr(-5, 5) === "ga.js"){
          result.push(myScripts[i].baseURI + " has ga.js installed");
          } 
       }
      if(result.length < 1){
     	console.log("No standard analytics tags were found");
     }
     console.log(result);
})();