[Andrey28081991]

Все нашел, если кому надо:

function overlap($div1, $div2) {
      var x1 = $div1.offset().left,
		  y1 = $div1.offset().top,
		  height1 = $div1.outerHeight(true),
		  width1 = $div1.outerWidth(true),
		  b1 = y1 + height1,
		  r1 = x1 + width1,
		  x2 = $div2.offset().left,
		  y2 = $div2.offset().top,
		  height2 = $div2.outerHeight(true),
		  width2 = $div2.outerWidth(true),
		  b2 = y2 + height2,
		  r2 = x2 + width2;

      if (b1 < y2 || y1 > b2 || r1 < x2 || x1 > r2) return false;
      return true;
    }