I have an element that is position:fixed and so scrolls with the page how i want it to however. when the user scrolls up I want the element to stop scrolling at a certain point, say when it is 250px from the top of the page, is this possible? Any help or advice would be helpful thanks!
我有一种感觉，我需要使用jquery来实现这一点.我试图获取用户所在位置的滚动条或位置，但确实感到困惑，有什么jquery解决方案吗？
Here's a quick jQuery plugin I just wrote that can do what you require:
$.fn.followTo = function (pos) {
var $this = this,
$window = $(window);
$window.scroll(function (e) {
if ($window.scrollTop() > pos) {
$this.css({
position: 'absolute',
top: pos
});
} else {
$this.css({
position: 'fixed',
top: 0
});
}
});
};
$('#yourDiv').followTo(250);