javascript代码控制页面滚动到网页顶端
<script language="javascript"> var goto_top_type = -1; var goto_top_itv = 0; function goto_top_timer() { var y = goto_top_type == 1 ? document.documentElement.scrollTop : document.body.scrollTop; var moveby = 15; y -= Math.ceil(y * moveby / 100); if (y < 0) { y = 0; } if (goto_top_type == 1) { document.documentElement.scrollTop = y; } else { document.body.scrollTop = y; } if (y == 0) { clearInterval(goto_top_itv); goto_top_itv = 0; } } function goto_top() { if (goto_top_itv == 0) { if (document.documentElement && document.documentElement.scrollTop) { goto_top_type = 1; } else if (document.body && document.body.scrollTop) { goto_top_type = 2; } else { goto_top_type = 0; } if (goto_top_type > 0) { goto_top_itv = setInterval('goto_top_timer()', 50); } } } </script> <a href="javascript:void(0)" onclick="goto_top()">【返回顶部】</a>