/***
	This two methods is used on google maps to load and unload map in a cleaner way
***/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }

}

function addUnLoadEvent(func) {
        var oldonunload = window.onunload;
        if (typeof window.onunload != 'function') {
          window.onunload = func;
        } else {
          window.onunload = function() {
            oldonunload();
            func();
          }
        }
}