var myFun = (function() {
  var called = false;
  return function() {
    if (!called) {
      console.log("I've been called");
      called = true;
    }
  }
})()

function callonce() {
  console.log("I've been called");
  arguments.callee = function() {};
}

function makeSingleCallFun(fun) {
  var called = false;
  return function() {
    if (!called) {
       fun.apply(this, arguments);
    }
  }
}

// Alternate implementation
function makeSingleCallFun(fun) {
    return function() {
      fun.apply(this, arguments);
      arguments.callee = function() {};
    }
}

var myFun = makeSingleCallFun(function() {
  console.log("I've been called");
});
myFun(); // logs I've been called
myFun(); // Does nothing

// your function definition
function yourFunction() {}

// decorator
function callItOnce(fn) {
    var called = false;
    return function() {
        if (!called) {
            called = true;
            return fn();
        }
        return;
    }
}

yourFunction(); // it runs
yourFunction(); // it runs
yourFunction = callItOnce(yourFunction);
yourFunction(); // it runs
yourFunction(); // null

var myLibraryFunction = callItOnce(libraryFunction);
myLibraryFunction(); // it runs
myLibraryFunction(); // null
libraryFunction(); // it runs

var callMeOnlyOnce=function(){

    if(this.alreadyCalled)return;

    alert('calling for the first time');

    this.alreadyCalled=true;
};

// alert box comes
callMeOnlyOnce();


// no alert box
callMeOnlyOnce();

if(!window.mynamespace){
    window.mynamespace={};
}

mynamespace.callMeOnlyOnce=function(){

    if(mynamespace.alreadyCalled)return;

    alert('calling for the first time');
    mynamespace.alreadyCalled=true;
};

// alert box comes
mynamespace.callMeOnlyOnce();


// no alert box
mynamespace.callMeOnlyOnce();

var called = false;
function blah() {
   called = true;
}

if ( !called ) {
   blah();
}

If (!your_func.called) {
    your_func.called = true;
    your_func();
}