自定义样式的滚动条

<html>

<head>

<title>自定义滚动条（javascript+图片，非css，滚动跳高度自适应）</title>

html {

background-color: #000000;

height: 100%;

width: 100%;

}

body {

font-size:9pt;

color:#000000;

text-decoration: none;

margin: 0px;

padding: 0px;

background-color: #CCCCCC;

background-image: url(images/bg_scroll.gif);

background-repeat: repeat-y;

background-position: 164px 0px;

height: 373px;

width: 180px;

}

#scrollerContent {POSITION: absolute}

#drag {

background-color: #000000;

width: 9px;

margin-left: 1px;

}

</STYLE>

var upH = 7;//向上的箭头的高度

var upW = 10; //向上的箭头的宽度

var downH = 7;//向下的箭头的高度

var downW = 10;//向下的箭头的宽度

var dragH = 24; //滚动条的高度

var dragW = 10; //滚动条的宽度

var scrollH =351; //滚动体的高度

var speed =9; //滚动的速度

var dom = document.getElementById ? true:false;

var nn4 = document.layers ? true:false;

var ie4 = document.all ? true:false;

var mouseY;

var mouseX;

var clickUp = false;

var clickDown = false;

var clickDrag = false;

var clickAbove = false;

var clickBelow = false;

var timer = setTimeout("",500);

var upL;

var upT;

var downL;

var downT;

var dragL;

var dragT;

var rulerL;

var rulerT;

var contentT;

var contentH;

var contentClipH;

var scrollLength;

var startY;

function down(e){

if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true;

getMouse(e);

startY = (mouseY - dragT);

if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){

clickUp = true;

return scrollUp();

}

else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){

clickDown = true;

return scrollDown();

}

else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))){

clickDrag = true;

return false;

}

else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= rulerT && (mouseY <= (rulerT + scrollH))){

if(mouseY < dragT){

clickAbove = true;

clickUp = true;

return scrollUp();

}

else{

clickBelow = true;

clickDown = true;

return scrollDown();

}

else{

return true;

}

function move(e){

if(clickDrag && contentH > contentClipH){

getMouse(e);

dragT = (mouseY - startY);

if(dragT < (rulerT))

dragT = rulerT;

if(dragT > (rulerT + scrollH - dragH))

dragT = (rulerT + scrollH - dragH);

contentT = ((dragT - rulerT)*(1/scrollLength));

contentT = eval('-' + contentT);

moveTo();

if(ie4)

return false;

}

function up(){

clearTimeout(timer);

clickUp = false;

clickDown = false;

clickDrag = false;

clickAbove = false;

clickBelow = false;

return true;

}

function getT(){

if(ie4)

contentT = document.all.scrollerContent.style.pixelTop;

else if(nn4)

contentT = document.scrollerContentClip.document.scrollerContent.top;

else if(dom)

contentT = parseInt(document.getElementById("scrollerContent").style.top);

}

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;

}

function moveTo(){

if(ie4){

document.all.scrollerContent.style.top = contentT;

document.all.ruler.style.top = dragT;

document.all.drag.style.top = dragT;

}

else if(nn4){

document.scrollerContentClip.document.scrollerContent.top = contentT;

document.ruler.top = dragT;

document.drag.top = dragT;

}

else if(dom){

document.getElementById("scrollerContent").style.top = contentT + "px";

document.getElementById("drag").style.top = dragT + "px";

document.getElementById("ruler").style.top = dragT + "px";

}

function scrollUp(){

getT();

if(clickAbove){

if(dragT <= (mouseY-(dragH/2)))

return up();

}

if(clickUp){

if(contentT < 0){

dragT = dragT - (speed*scrollLength);

if(dragT < (rulerT))

dragT = rulerT;

contentT = contentT + speed;

if(contentT > 0)

contentT = 0;

moveTo();

timer = setTimeout("scrollUp()",25);

}

return false;

}

function scrollDown(){

getT();

if(clickBelow){

if(dragT >= (mouseY-(dragH/2)))

return up();

}

if(clickDown){

if(contentT > -(contentH - contentClipH)){

dragT = dragT + (speed*scrollLength);

if(dragT > (rulerT + scrollH - dragH))

dragT = (rulerT + scrollH - dragH);

contentT = contentT - speed;

if(contentT < -(contentH - contentClipH))

contentT = -(contentH - contentClipH);

moveTo();

timer = setTimeout("scrollDown()",25);

}

return false;

}

function reloadPage(){

location.reload();

}

function eventLoader(){

if(ie4){

upL = document.all.up.style.pixelLeft;

upT = document.all.up.style.pixelTop;

downL = document.all.down.style.pixelLeft;

downT = document.all.down.style.pixelTop;

dragL = document.all.drag.style.pixelLeft;

dragT = document.all.drag.style.pixelTop;

rulerT = document.all.ruler.style.pixelTop;

contentH = parseInt(document.all.scrollerContent.scrollHeight);

contentClipH = parseInt(document.all.scrollerContentClip.style.height);

}

else if(nn4){

upL = document.up.left;

upT = document.up.top;

downL = document.down.left;

downT = document.down.top;

dragL = document.drag.left;

dragT = document.drag.top;

rulerT = document.ruler.top;

contentH = document.scrollerContentClip.document.scrollerContent.clip.bottom;

contentClipH = document.scrollerContentClip.clip.bottom;

}

else if(dom){

upL = parseInt(document.getElementById("up").style.left);

upT = parseInt(document.getElementById("up").style.top);

downL = parseInt(document.getElementById("down").style.left);

downT = parseInt(document.getElementById("down").style.top);

dragL = parseInt(document.getElementById("drag").style.left);

dragT = parseInt(document.getElementById("drag").style.top);

rulerT = parseInt(document.getElementById("ruler").style.top);

contentH = parseInt(document.getElementById("scrollerContent").offsetHeight);

contentClipH = parseInt(document.getElementById("scrollerContentClip").offsetHeight);

document.getElementById("scrollerContent").style.top = 0 + "px";

}

scrollLength = ((scrollH-dragH)/(contentH-contentClipH));

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

onload="eventLoader()">

<SPAN

id=drag

style="LEFT: 164px;POSITION: absolute; TOP: 8px"></SPAN> <SPAN

id=ruler

style="TOP: 8px"></SPAN> <SPAN

id=up

style="LEFT: 164px; POSITION: absolute; TOP: 0px"><IMG

height=7 alt="" src="images/scroll_r1_c1.gif" width=10 border=0></SPAN> <SPAN id=down

style="LEFT: 164px; POSITION: absolute; TOP: 360px"><IMG

height=6 alt="" src="images/scroll_r5_c1.gif" width=10 border=0></SPAN> <SPAN

id=scrollerContentClip

style=" LEFT: 0; VISIBILITY: visible; OVERFLOW: hidden; WIDTH: 164; CLIP: rect(0px 164px 365px 0px); POSITION: absolute; TOP: 0; HEIGHT: 365;border:#CC6600 0px solid"><SPAN

id=scrollerContent style="width: 164; height: 365">

<h1>自定义样式的滚动条</h1>

<p>javascript+图片实现，滚动条的高度随着内容区的多少而自动变化（类似于默认的滚动条），当内容没有超出规定区域时，滚动条隐藏不显示。</p><h1>自定义样式的滚动条</h1>

<p>javascript+图片实现，滚动条的高度随着内容区的多少而自动变化（类似于默认的滚动条），当内容没有超出规定区域时，滚动条隐藏不显示。</p>

</SPAN></SPAN>

contentH = parseInt(document.getElementById("scrollerContent").offsetHeight);

dragH=parseInt((351/contentH)*351);

if(contentH>365){

document.getElementById("drag").style.height = dragH + "px";}

if(contentH<=365){

document.getElementById("drag").style.display="none";

document.getElementById("ruler").style.display="none";

}

//alert(contentH);

//alert(dragH);

</script>

</BODY>

</html>

http://www.think365.com/mycode/js/scroll-pic/

posted on 2007-02-25 17:28 mbskys 阅读(1485) 评论(0) 收藏举报