js上下按钮代替滚动条

㈠ 求一段js按钮控制图片上下滚动的代码。

代码：
var arrowImageHeight = 35; // Height of arrow image in pixels;
var displayWaitMessage=true; // Display a please wait message while images are loading?

var previewImage = false;
var previewImageParent = false;
var slideSpeed = 0;
var previewImagePane = false;
var slideEndMarker = false;
var galleryContainer = false;
var imageGalleryCaptions = new Array();
function getTopPos(inputObj)
{

var returnValue = inputObj.offsetTop;
while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetTop;
return returnValue;
}

function getLeftPos(inputObj)
{

var returnValue = inputObj.offsetLeft;
while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetLeft;
return returnValue;
}

function showPreview(newSrc,imageIndex)
{
if(!previewImage){
var images = document.getElementById('previewPane').getElementsByTagName('IMG');
if(images.length>0){
previewImage = images[0];
}else{
previewImage = document.createElement('IMG');
document.getElementById('previewPane').appendChild(previewImage);
}

}
if(displayWaitMessage){
document.getElementById('waitMessage').style.display='inline';
}
document.getElementById('largeImageCaption').style.display='none';
previewImage.onload = function() { hideWaitMessageAndShowCaption(imageIndex-1); };
previewImage.src = newSrc;

}
function hideWaitMessageAndShowCaption(imageIndex)
{
document.getElementById('waitMessage').style.display='none';
document.getElementById('largeImageCaption').innerHTML = imageGalleryCaptions[imageIndex];
document.getElementById('largeImageCaption').style.display='block';

}
function initSlide(e)
{
if(document.all)e = event;

if(this.src.indexOf('over')<0)this.src = this.src.replace('.gif','-over.gif');

slideSpeed = e.clientY + Math.max(document.body.scrollTop,document.documentElement.scrollTop) - getTopPos(this);
if(this.src.indexOf('down')>=0){
slideSpeed = (slideSpeed)*-1;
}else{
slideSpeed = arrowImageHeight - slideSpeed;
}
slideSpeed = Math.round(slideSpeed * 10 / arrowImageHeight);
}

function stopSlide()
{
slideSpeed = 0;
this.src = this.src.replace('-over','');
}

function slidePreviewPane()
{
if(slideSpeed!=0){
var topPos = previewImagePane.style.top.replace(/[^\-0-9]/g,'')/1;

if(slideSpeed<0 && slideEndMarker.offsetTop<(previewImageParent.offsetHeight - topPos)){
slideSpeed=0;

}
topPos = topPos + slideSpeed;
if(topPos>0)topPos=0;

previewImagePane.style.top = topPos + 'px';

}
setTimeout('slidePreviewPane()',30);
}

function revealThumbnail()
{
this.style.filter = 'alpha(opacity=100)';
this.style.opacity = 1;
}

function hideThumbnail()
{
this.style.filter = 'alpha(opacity=50)';
this.style.opacity = 0.5;
}

function initGalleryScript()
{
previewImageParent = document.getElementById('theImages');
previewImagePane = document.getElementById('theImages').getElementsByTagName('DIV')[0];
previewImagePane.style.top = '0px';
galleryContainer = document.getElementById('galleryContainer');
var images = previewImagePane.getElementsByTagName('IMG');
for(var no=0;no<images.length;no++){
images[no].onmouseover = revealThumbnail;
images[no].onmouseout = hideThumbnail;
}
slideEndMarker = document.getElementById('slideEnd');

document.getElementById('arrow_up_image').onmousemove = initSlide;
document.getElementById('arrow_up_image').onmouseout = stopSlide;

document.getElementById('arrow_down_image').onmousemove = initSlide;
document.getElementById('arrow_down_image').onmouseout = stopSlide;
var divs = previewImageParent.getElementsByTagName('DIV');
for(var no=0;no<divs.length;no++){
if(divs[no].className=='imageCaption')imageGalleryCaptions[imageGalleryCaptions.length] = divs[no].innerHTML;
}
slidePreviewPane();

}

window.onload = initGalleryScript;

㈡ javascript 实现点击键盘上下键，页面右侧滚动条不随之上下滚动

onkeypress = garbEvent;

function grabEvent(){
var key_code = event.keyCode || event.which;

switch(key_code){
case 38: //up
return 0;

break;

case 40: //down
return 0;

break;

}

}

通过onkeypress事件监听按键， 如果按键为38(小键盘上), 40(小键盘下)时, 不进行任何操专作.
跳出程序属.

㈢ 如何使用JS控制DIV内容的滚动条

1、首先需要抄新建一个HTML文档，这里设立一下基本的架构。

㈣ js,鼠标上下滑轮或者拉动滚动条触发事件

window.onmousewheel=function(){//触发滚轮事件
	
}
window.onscroll=function(){//滚动条事件

}
//其实你的问题直接使用判断滚动条应该就可以了，但是版如果一定要拖动滚动条才执行权事件，我们可以通过获取鼠标位置来模拟
vara=document.getElementsByTagName("html")[0];
window.onmousemove=function(){
//一般默认滚动条12px宽，当鼠标位于浏览器窗口右边12px内按下鼠标可以视为拖动滚动条
	if(innerWidth-event.clientX<12){
		a.onmousedown=function(){
			console.log(1);
		}
	}else{
		a.onmousedown=null;
	}
}

㈤ js点击按钮控制滚动条缓慢移动到底部

修改完成了 你把 你的js全部替换下即可

<scripttype="text/javascript">
varcurrentPosition,timer;
functionGoTop(){
currentPosition=document.documentElement.scrollTop;
currentPosition-=50;
if(currentPosition>0){
window.scrollTo(0,currentPosition);
timer=setInterval("GoTop()",10);
}else{
currentPosition=0;
window.scrollTo(0);

window.clearInterval(timer);
}

}
varcurrentPosition2,timer2;
functionGoBottom(){
currentPosition2=document.documentElement.scrollTop;

currentPosition2+=50;
if(currentPosition2<=1000){

window.scrollTo(0,currentPosition2);
timer2=setInterval("GoBottom()",100);
}else{
currentPosition=1000;
window.scrollTo(0,1000);
window.clearInterval(timer2);
}
}

</script>

㈥ javascript如何去掉浏览器的滚动条垂直的

这个可以用CSS实现 你可以用JS操作CSS
方法一：设置CSS属性overflow为hidden。内
＜body style="overflow:hidden"＞容
方法二：设置body元素的scroll属性为no。
＜body scroll="no"＞
如果只想隐藏横向或纵向上的滚动条，可以用overflow-x或overflow-y来设置。