随屏控制滚动条滚动

人气：　来源：网络　作者：佚名　所属栏目：窗口类　[切换到繁體中文]

介绍：用上下箭头来控制滚动条的上下滚动，箭头同时随屏上下浮动。

演示：

<!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=gb2312" />
<title>站长手册_特效演示_随屏控制滚动条滚动</title>
<style><!--body,td{font-size: 12px;}--></style>

</head>
<body bgcolor="" 无>
<table width="100%" height="1000" border="0" cellpadding="10" cellspacing="5">
<tr>
<td valign="top">
<DIV id=staticbuttons style="POSITION: absolute"><A 
onmouseover=myspeed=-thespeed onmouseout=myspeed=0 href="javascript:"><IMG 
height=21 src="/texiao/zzsc_demo/toptop.gif" width=17 border=0></A><BR><A 
onmouseover=myspeed=thespeed onmouseout=myspeed=0 href="javascript:"><IMG 
height=21 src="/texiao/zzsc_demo/bottombottom.gif" width=17 border=0></A> </DIV>
<SCRIPT>
var Hoffset=70 //Enter buttons' offset from right edge of window (adjust depending on images width)
var Voffset=80 //Enter buttons' offset from bottom edge of window (adjust depending on images height)
var thespeed=3 //Enter scroll speed in integer (Advised: 1-3)

var ieNOTopera=document.all&&navigator.userAgent.indexOf("Opera")==-1
var myspeed=0

var ieHoffset_extra=document.all? 15 : 0
var cross_obj=document.all? document.all.staticbuttons : document.getElementById? document.getElementById("staticbuttons") : document.staticbuttons

function positionit(){
var dsocleft=document.all? document.body.scrollLeft : pageXOffset
var dsoctop=document.all? document.body.scrollTop : pageYOffset
var window_width=ieNOTopera? document.body.clientWidth+ieHoffset_extra : window.innerWidth+ieHoffset_extra
var window_height=ieNOTopera? document.body.clientHeight : window.innerHeight

if (document.all||document.getElementById){
cross_obj.style.left=parseInt(dsocleft)+parseInt(window_width)-Hoffset
cross_obj.style.top=dsoctop+parseInt(window_height)-Voffset
}
else if (document.layers){
cross_obj.left=dsocleft+window_width-Hoffset
cross_obj.top=dsoctop+window_height-Voffset
}
}

function scrollwindow(){
window.scrollBy(0,myspeed)
}

function initializeIT(){
positionit()
if (myspeed!=0){
scrollwindow()
}
}

if (document.all||document.getElementById||document.layers)
setInterval("initializeIT()",20)

</SCRIPT>
</td>
</tr>
</table>
</body>
</html>

[Ctrl+A全选提示：你可先修改部分代码，再按运行]

下面教你如何应用此特效：

　--------------------------------------------------------------------------------------
　　需要在<body 这里>加入的代码：无
　--------------------------------------------------------------------------------------

以下代码加到<head>…</head>中

以下代码加到<body>…</body>中

<DIV id=staticbuttons style="POSITION: absolute"><A
onmouseover=myspeed=-thespeed onmouseout=myspeed=0 href="javascript:"><IMG
height=21 src="/texiao/zzsc_demo/toptop.gif" width=17 border=0></A><BR><A
onmouseover=myspeed=thespeed onmouseout=myspeed=0 href="javascript:"><IMG
height=21 src="/texiao/zzsc_demo/bottombottom.gif" width=17 border=0></A> </DIV>
<SCRIPT>
var Hoffset=70 //Enter buttons' offset from right edge of window (adjust depending on images width)
var Voffset=80 //Enter buttons' offset from bottom edge of window (adjust depending on images height)
var thespeed=3 //Enter scroll speed in integer (Advised: 1-3)

var ieNOTopera=document.all&&navigator.userAgent.indexOf("Opera")==-1
var myspeed=0

var ieHoffset_extra=document.all? 15 : 0
var cross_obj=document.all? document.all.staticbuttons : document.getElementById? document.getElementById("staticbuttons") : document.staticbuttons

function positionit(){
var dsocleft=document.all? document.body.scrollLeft : pageXOffset
var dsoctop=document.all? document.body.scrollTop : pageYOffset
var window_width=ieNOTopera? document.body.clientWidth+ieHoffset_extra : window.innerWidth+ieHoffset_extra
var window_height=ieNOTopera? document.body.clientHeight : window.innerHeight

if (document.all||document.getElementById){
cross_obj.style.left=parseInt(dsocleft)+parseInt(window_width)-Hoffset
cross_obj.style.top=dsoctop+parseInt(window_height)-Voffset
}
else if (document.layers){
cross_obj.left=dsocleft+window_width-Hoffset
cross_obj.top=dsoctop+window_height-Voffset
}
}

function scrollwindow(){
window.scrollBy(0,myspeed)
}

function initializeIT(){
positionit()
if (myspeed!=0){
scrollwindow()
}
}

if (document.all||document.getElementById||document.layers)
setInterval("initializeIT()",20)

</SCRIPT>