jquery decision Div stops with scroll bar to a certain position

  This article mainly introduces jquery decision Div with the scroll bar scroll to a certain position after the Stop method, the need for friends can refer to the following

Implementation code:   Code as follows: <script type= "Text/javascript" > var rollset = $ (' #widget ');     var offset = Rollset.offset ();     var fwidth = $ ("#footer"). Height ();     $ (window). Scroll (function () {        var scrolltop = $ (window). scrolltop ();   &nbs P     var SCROLLBTM = $ (document). Height ()-$ (window). scrolltop ()-$ ("#widget"). Height ();         if (Offset.top < scrolltop) {            if (Scrollbtm >) Fwidth) {                rollset.removeclass (' absolute '). addclass (' fixed ') &nbsp ;          } else {                Rollset.removeclass (' F Ixed '). addclass (' absolute ')            }        } else {            rollset.removeclass (' fixed ')         {   })</script>   Method Description: Subtracting the height of the scroll by the total height of the page minus the height of the layer with the ID widget is equal to the height at the bottom of the layer; When the height of the bottom is less than or equal to the height at the bottom of the specified position, remove the style fixed. Then add absolute positioning to the layer! CSS to add position:relative to the parent layer;