[rusher]

рони,

так лучше?

var image = document.getElementById("myImage");
    image.addEventListener("click", function(){
      if (this.classList.contains("changed")){
        this.src = "style/images/img1.png";
        this.className = "";}
      else{
        this.className="changed";
        this.src = "style/images/img2.png";}
     });