text: var trigger_sockets = function () {
  	var socket = io();
  	socket.emit('user_joined', 'username');
  };
  
  var card_display_allow_drop = function(ev){
  	ev.preventDefault();
  	console.log("allow drop");
  }
  	
  var card_display_drop = function(ev){
  	ev.preventDefault();
  	console.log("drop");
  }
  
  var card_drag_start = function(ev){
  	console.log("drag start");
  }
  
  var on_click_card = function(ev){
  	console.log("click");
  	ev['toElement'].style.backgroundColor = 'green';
  }