<html>
<head>
<title>網頁特效|http://www.jscode.cn|---用圖片替代滾動條的方法</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">
#scrollerContent {POSITION: absolute}
body {font-size:9pt;color:#660000;text-decoration: none}
</style>
<script>
var leftH = 13;//向上的箭頭的高度
var leftW = 9; //向上的箭頭的寬度
var rightH = 13;//向下的箭頭的高度
var rightW = 9;//向下的箭頭的寬度
var dragH = 9; //滾動條的高度
var dragW = 26; //滾動條的寬度
var scrollW =78; //滾動體的高度
var speed =9; //滾動的速度
var dom = document.getElementById ? true:false;
var nn4 = document.layers ? true:false;
var ie4 = document.all ? true:false;
var mouseY;
var mouseX;
var clickLeft = false;
var clickRight = false;
var clickDrag = false;
var clickAbove = false;
var clickBelow = false;
var timer = setTimeout("",500);
var leftL;
var leftT;
var rightL;
var rightT;
var dragL;
var dragT;
var rulerL;
var rulerT;
var contentL;
var contentW;
var contentClipW;
var scrollLength;
var startX;
function down(e)
{
//單擊左健時處理
if((document.layers && e.which!=1) || (document.all && event.button!=1))
return true;
getMouse(e);
startX = (mouseX - dragL);
if(mouseX >= leftL && (mouseX <= (leftL + leftW)) && mouseY >= leftT && (mouseY <= (leftT + leftH))) //單擊向左的箭頭
{
clickLeft = true;
return scrollForLeft();
}
else
if(mouseX >= rightL && (mouseX <= (rightL + rightW)) && mouseY >= rightT && (mouseY <= (rightT + rightH))) //單擊向右的箭頭
{
clickRight = true;
return scrollForRight();
}
else
if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))) //滾動條內不做操作
{
clickDrag = true;
return false;
}
else
if(mouseY >= dragT && (mouseY <= (dragT + dragH)) && mouseX >= rulerL && (mouseX <= (rulerL + scrollW))) //滾動體內
{
if(mouseX < dragL) //向左滾
{
clickAbove = true;
clickLeft = true;
return scrollForLeft();
}
else //向右滾
{
clickBelow = true;
clickRight = true;
return scrollForRight();
}
}
else
{
return true;
}
}
function move(e)
{
if(clickDrag && contentW > contentClipW) //有滾動條時執行
{
getMouse(e);
dragL = (mouseX - startX);
if(dragL < (rulerL))
dragL = rulerL;
if(dragL > (rulerL + scrollW - dragW))
dragL = (rulerL + scrollW - dragW);
contentL = ((dragL - rulerL)*(1/scrollLength));
contentL = eval('-' + contentL);
moveTo();
if(ie4)
return false;
}
}
//停止滾動
function up()
{
clearTimeout(timer);
clickLeft = false;
clickRight = false;
clickDrag = false;
clickAbove = false;
clickBelow = false;
return true;
}
function getL()
{
if(ie4)
contentL = document.all.scrollerContent.style.pixelLeft;
else
if(nn4)
contentL = document.scrollerContentClip.document.scrollerContent.left;
else
if(dom)
contentL = parseInt(document.getElementById("scrollerContent").style.left);
}
function getMouse(e)
{
if(ie4)
{
mouseY = event.clientY + document.body.scrollTop;
mouseX = event.clientX + document.body.scrollLeft;
}
else if(nn4 || dom)
{
mouseY = e.pageY;
mouseX = e.pageX;
}
}
//移動內容
function moveTo()
{
if(ie4)
{
document.all.scrollerContent.style.left = contentL;
document.all.ruler.style.left = dragL;
document.all.drag.style.left = dragL;
}
else
if(nn4)
{
document.scrollerContentClip.document.scrollerContent.top = contentL;
document.ruler.left = dragL;
document.drag.left = dragL;
}
else
if(dom)
{
document.getElementById("scrollerContent").style.left = contentL + "px";
document.getElementById("drag").style.left = dragL + "px";
document.getElementById("ruler").style.left = dragL + "px";
}
}
function scrollForLeft()
{
getL();
if(clickAbove)
{
if(dragL <= (mouseX-(dragW/2))) //移到指定的位置退出
return up();
}
if(clickLeft)
{
if(contentL < 0)
{
dragL = dragL - (speed*scrollLength);
if(dragL < (rulerL))
dragL = rulerL;
contentL = contentL + speed;
if(contentL > 0)
contentL = 0;
moveTo(); //移動一個滾動距離
timer = setTimeout("scrollForLeft()",25);
}
}
return false;
}
function scrollForRight()
{
getL();
if(clickBelow)
{
if(dragL >= (mouseX-(dragW/2)))
return up();
}
if(clickRight)
{
if(contentL > -(contentW - contentClipW))
{
dragL = dragL + (speed*scrollLength);
if(dragL > (rulerL + scrollW - dragW))
dragL = (rulerL + scrollW - dragW);
contentL = contentL - speed;
if(contentL < -(contentW - contentClipW))
contentL = -(contentW - contentClipW);
moveTo();
timer = setTimeout("scrollForRight()",25);
}
}
return false;
}
function reloadPage()
{
location.reload();
}
function eventLoader()
{
if(ie4)
{
leftL = document.all.up.style.pixelLeft;
leftT = document.all.up.style.pixelTop;
rightL = document.all.down.style.pixelLeft;
rightT = document.all.down.style.pixelTop;
dragL = document.all.drag.style.pixelLeft;
dragT = document.all.drag.style.pixelTop;
rulerL = document.all.ruler.style.pixelLeft;
contentW = parseInt(document.all.scrollerContent.scrollWidth);
contentClipW = parseInt(document.all.scrollerContentClip.style.width);
}
else
if(nn4)
{
leftL = document.up.left;
leftT = document.up.top;
rightL = document.down.left;
rightT = document.down.top;
dragL = document.drag.left;
dragT = document.drag.top;
rulerL = document.ruler.left;
contentW = document.scrollerContentClip.document.scrollerContent.clip.bottom; //還未修改
contentClipW = document.scrollerContentClip.clip.bottom; //還未修改
}
else
if(dom)
{
leftL = parseInt(document.getElementById("up").style.left);
leftT = parseInt(document.getElementById("up").style.top);
rightL = parseInt(document.getElementById("down").style.left);
rightT = parseInt(document.getElementById("down").style.top);
dragL = parseInt(document.getElementById("drag").style.left);
dragT = parseInt(document.getElementById("drag").style.top);
rulerL = parseInt(document.getElementById("ruler").style.left);
contentW = parseInt(document.getElementById("scrollerContent").offsetWidth);
contentClipW = parseInt(document.getElementById("scrollerContentClip").offsetWidth);
document.getElementById("scrollerContent").style.top = 0 + "px"; //這句有什麼用?
}
scrollLength = ((scrollW-dragW)/(contentW-contentClipW));
if(nn4)
{
document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
window.onresize = reloadPage;
}
document.onmousedown = down;
document.onmousemove = move;
document.onmouseup = up;
}
</script>
</head>
<body οnlοad="eventLoader()">
<span id="drag" style="left: 109px; position: absolute; top: 202px">
<img height="9" src="slider.gif" width="26" border="1">
</span>
<span id="ruler" style="left: 109px">
<img height="9" src="slider.gif" width="26" border="1">
</span>
<span id="up" style="left: 100px;position: absolute; top: 200px">
<img height="13" alt="" src="scrollup.gif" width="9" border="1">
</span>
<span id="down" style="left: 189px; position: absolute; top: 200px">
<img height="13" alt="" src="scrolldown.gif" width="9" border="1">
</span>
<span style="left: 100px; position: absolute; top: 200px">
<img height="13" alt="" src="scrolldown.gif" width="100" border="1">
</span>
<span id="scrollerContentClip" style="left: 100; visibility: visible; overflow:hidden; width: 100; clip: rect(0px 140px 194px 0px);position: absolute; top: 100; height: 100; border: #CC6600 1px solid">
<span id="scrollerContent" style="width: 200; height: 100">
<p></p>
<p></p>
<p>呵呵呵呵</p>
<p>在移動焦點到其它元素之後立即觸發於當前擁有焦點的元素上觸發</p>
<p>呵呵</p>
<p>呵呵</p>
<p>呵呵呵呵</p>
<p>呵呵呵呵</p>
<p>呵呵呵</p>
<p>呵呵呵呵</p>
<p>呵呵</p>
</span>
</span>
</body>
</html>
