Changed Top Margin

[kaynenh]

Hi- nice plugin! It works well, but I noticed that if the top margin of the menu changes (ie something above the element in the DOM slides larger) the topMargin of the menu doesn't update accordingly, which can cause the menu to overlap elements above it. I believe the fix would be to check and see if the menu's initial y position has changed prior to this line:

if(vartop < varscroll + topMargin){

Maybe something like this (didn't test this):

var morePadding = 0;
//If the initial y position of the menu is now less than the y position of the menu
if (initial_y < current_y) {
  //give more padding to the margin before adding the isStuck class
  morePadding = current_y - initial_y;
}
if (vartop < varscroll + topMargin + morePadding) {

The only problem with the above approach is that it doesn't take into account the changing y position of the menu as you scroll down the page.