預覽地址：
https://ovsexia.gitee.io/leftfixed/
html:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="js/jquery-1.10.1.min.js" type="text/javascript"></script>
<link href="css/layout.css" type="text/css" rel="stylesheet" />
<link href="css/style.css" type="text/css" rel="stylesheet" />
</head>
<div class="top"></div>
<div class="page">
<div class="left">
<div class="left_poi"></div>
<div class="left_in">
<p><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /></p>
</div><!--left_in-->
<script>
$(window).scroll(function()
{
saction();
});
function saction()
{
sj = 20; //底部間隔
st = $(window).scrollTop(); //滾動條高度
sd = $(".left_poi").offset().top;
sd_h = $(".left_in").height();
sb = $(".bottom").offset().top;
sb_h = $(".bottom").height();
rd_h = $(".right").height();
bh = window.innerHeight;
si = sb-sd_h;
if(st>sd && rd_h>=sd_h){
$(".left_in").addClass("on");
if(st>si){
sy = bh-(sb-st)+sj;
$(".left_in").css({"top":"auto","bottom":sy+"px"});
}else{
$(".left_in").css({"top":"","bottom":""});
}
}else{
$(".left_in").removeClass("on");
}
}
</script>
</div><!--left-->
<div class="right"></div>
<div class="clear"></div>
</div><!--page-->
<div class="bottom"></div>
</body>
</html>css
@charset "utf-8";
.clear {clear:both; height:0 !important; width:0 !important; overflow:hidden; font-size:0;}
.top {width:100%; height:150px; background:#0CC;}
.bottom {width:100%; height:400px; background:#39C;} 新聞熱點
疑難解答
