Determine if jquery has been loaded, if not dynamically loaded

Method One:

//Only do anything if jQuery isn ' t definedif(typeofJQuery = = ' undefined ') {    if(typeof$ = = ' function ') {        //warning, global varThispageusingotherjslibrary =true; }        functiongetScript (URL, success) {varScript = document.createelement (' script '); SCRIPT.SRC=URL; varHead = document.getElementsByTagName (' head ') [0], done=false; //Attach handlers for all browsersScript.onload = Script.onreadystatechange =function() {                    if(!done && (!) This. readyState | | This. readyState = = ' Loaded ' | | This. readyState = = ' complete ') ) { done=true; //callback function provided as Paramsuccess (); Script.onload= Script.onreadystatechange =NULL;                            Head.removechild (script);                };                };        Head.appendchild (script);        }; GetScript (' Http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js ',function() {            if(typeofjquery== ' undefined ') {                    //Super Failsafe-still somehow failed ...                } Else {                    //JQuery loaded! Make sure-noconflict just in caseFancycode (); if(thispageusingotherjslibrary) {//Run your jQuery Code            } Else {                //Use . Noconflict () and then run your jQuery Code            }                }        }); } Else{//JQuery was already loaded        //Run your jQuery Code};//The code snippet is from: http://www.sharejs.com/codes/javascript/4281

Method Two: Document.Write

varjqueryscriptoutputted =false;functionInitjquery () {//if the JQuery object isn ' t available    if(typeof(jQuery) = = ' undefined ') {            if(!jqueryscriptoutputted) {            //Only output the script once .jqueryscriptoutputted =true; //output the script (load it from Google API)document.write ("<SCR" + "IPT type=" Text/javascript "src=" http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/ Jquery.min.js "></SCR" + "ipt>"); } setTimeout ("Initjquery ()", 50); } Else {                                $(function() {              //Do anything this needs to being done on Document.ready            //don ' t really need this dom ready thing if used in footer        }); }}initjquery ();//The code snippet is from: http://www.sharejs.com/codes/javascript/4281

Determine if jquery has been loaded, if not dynamically loaded