
Thêm CSS
Bạn hãy thêm đoạn code bên dưới vào trước thẻ ]]></b:skin>#gotop{cursor:pointer;width:30px;height:30px;position:fixed !important;position:absolute;z-index:999;text-indent:-9999px;border:1px solid #144F69;background-color:#067BAF;background-image:-webkit-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-moz-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-ms-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-o-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:radial-gradient(ellipse at center top,#2493C4,#086A95);-webkit-box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;-moz-box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;-webkit-border-radius:10px 0 0 0;-moz-border-radius:10px 0 0 0;border-radius:10px 0 0 0;overflow:hidden}
#gotop:hover:after{border-bottom-color:white}
#gotop:after{content:"";display:block;width:0;height:0;border-width:10px 4px;border-style:solid;border-color:transparent transparent #C3D1D7 transparent;position:absolute;top:0;left:11px}
#gobottom{cursor:pointer;width:30px;height:30px;position:fixed!important;position:absolute;top:26px;right:0;z-index:99;text-indent:-9999px;border:1px solid #144F69;background-color:#067BAF;background-image:-webkit-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-moz-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-ms-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:-o-radial-gradient(ellipse at center top,#2493C4,#086A95);background-image:radial-gradient(ellipse at center top,#2493C4,#086A95);-webkit-box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;-moz-box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;box-shadow:inset 0 0 0 1px #2493C4,0 1px 3px black;-webkit-border-radius:0 0 0 10px;-moz-border-radius:0 0 0 10px;border-radius:0 0 0 10px;overflow:hidden}
#gobottom:hover:after{border-top-color:white}
#gobottom:after{content:"";display:block;width:0;height:0;border-width:10px 4px;border-style:solid;border-color:#C3D1D7 transparent transparent transparent;position:absolute;top:10px;left:11px}
Javascript
Thêm code sau vào trước thẻ đóng </body><script type='text/javascript'>
//<![CDATA[
$(window).scroll(function () {
if ($(this).scrollTop() > 100) {
$("#gotop").removeAttr("href");
$("#gotop").stop().animate({
bottom: "0",
right: "0"
}, {
duration: 800,
queue: false
})
} else {
$("#gotop").stop().animate({
bottom: "-50",
right: "-50"
}, {
duration: 1000,
queue: false
})
}
if ($(this).scrollTop() > 100) {
$("#gobottom").removeAttr("href");
$("#gobottom").stop().animate({
top: "-50",
right: "-50"
}, {
duration: 800,
queue: false
})
} else {
$("#gobottom").stop().animate({
top: "0",
right: "0"
}, {
duration: 1000,
queue: false
})
}
});
$(function () {
$("#gotop").click(function () {
$("html, body").animate({
scrollTop: 0
}, "slow");
return false
})
$("#gobottom").click(function () {
$("html, body").animate({
scrollTop: $('#footer').offset().top
}, 970);
return false
})
});
//]]>
</script>
<a id="gotop" style="bottom: -50px; right: -50px;">Lên Trên!</a>
<a id="gobottom" style="top: 0px; right: 0px;">Xuống Dưới!</a>
<div id='footer'/>
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