first commit

_ext/scripts/utilities/on.js

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+//add event listener for any element which calls a function
+//element can be provided as a direct reference or with just a string of the name
+
+function on(event, elementId, functionCallback) {
+	
+	
+	
+	//if element provided is string, get the actual element
+	var element = (typeof elementId == 'string' ? document.getElementById(elementId) : elementId);
+	
+	//console.log('added '+event+' event listener on '+element) 
+	
+	element.addEventListener(event,
+	  function (e) {
+	     // e = event
+	     //this = element clicked
+	     functionCallback(e, this);
+	     //if you need to access the event or this variable, you need to add them
+	     //when you define the callback, but you cant use the word this, eg:
+	     //on('click', menuButton, function (e, button) {});
+	  });
+}