Name : checkloadjscssfile(filename, filetype) - Language : JavaScript - type : function - platform : generic

checkloadjscssfile.js

// see : http://www.javascriptkit.com/javatutors/loadjavascriptcss.shtml
// Load a js or a css file
var filesadded = "", //list of files already added 
    fileref = "";

function checkloadjscssfile (filename, filetype) {
  "use strict";
  if (filesadded.indexOf("[" + filename + "]") === -1) {
    if (loadjscssfile(filename, filetype)) {
      filesadded += "[" + filename + "]"; //List of files added in the form "[filename1],[filename2],etc"
      return true;
    } else {
      return false;
    }
  } else {
    return false;
  }
}

// Load a js or a css file
function loadjscssfile(filename, filetype) {
  "use strict";
  fileref = "";
  if (filetype === "js") { //if filename is a external JavaScript file
    fileref = document.createElement('script');
    fileref.setAttribute("type", "text/javascript");
    fileref.setAttribute("src", filename);
  } else if (filetype === "css") { //if filename is an external CSS file
    fileref = document.createElement("link");
    fileref.setAttribute("rel", "stylesheet");
    fileref.setAttribute("type", "text/css");
    fileref.setAttribute("href", filename);
  }
  if (typeof fileref !== "undefined") { 
    document.getElementsByTagName("head")[0].appendChild(fileref);
    return true;
  } else {
    return false;
  }
}

// example
checkloadjscssfile("myscript.js", "js"); //dynamically load and add this .js file
checkloadjscssfile("javascript.php", "js"); //dynamically load "javascript.php" as a JavaScript file
checkloadjscssfile("mystyle.css", "css"); ////dynamically load and add this .css file
checkloadjscssfile("myscript.js", "js"); //dynamically load and add this .js file
checkloadjscssfile("javascript.php", "js"); //dynamically load "javascript.php" as a JavaScript file
checkloadjscssfile("mystyle.css", "css"); ////dynamically load and add this .css file