code: function() {
  
       	var modules = this.modules;
       	for(var i = 0 ; i < modules.length ; i++) {
  		  	this.addModuleToList(modules[i]);
       	}
  
       	// Make the layer a drag drop target
       	if(!this.ddTarget) {
         	this.ddTarget = new YAHOO.util.DDTarget(this.layer.el, "module");
         	this.ddTarget._layer = this.layer;
       	}
   	}
docs: Build the left menu on the left
  @method buildModulesList