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代码开始（此行不用复制）
<HTML>
<HEAD>
<TITLE>滑动条</TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script language="javascript">
var objContainsDiv;
var objTrackBar;
var objTrackPath;
var objScaleDiv;
var scaleNumber = 20;
var scaleLenth; //刻度长度
var vLeft;
var vaildLength; //滑块能够移动的有效长度
function contentLoad()
{
objContainsDiv = trackDiv;//容器
objTrackBar = createTrack();
objTrackBar = objContainsDiv.appendChild(objTrackBar);
objTrackPath = trackDegree;
objTrackBar.onmousedown = trackBarBeforeMove;
objTrackBar.onmouseup = trackBeforeMouseup;
objTrackPath.onclick = setPos;
vaildLength = parseInt(objContainsDiv.offsetWidth) - parseInt(objTrackBar.offsetWidth) - 2;
scaleLenth = Math.round(parseInt(objContainsDiv.offsetWidth)/scaleNumber);
//手动生成刻度线
for(var i=0;i<scaleNumber - 1;i++){
objScaleDiv = this.document.createElement("<div style='position:absolute;left:50;top:13;font-size:4pt;font-weight:lighter;color:#999999;width:3:'/>");
objScaleDiv = objContainsDiv.appendChild(objScaleDiv);
with(objScaleDiv){
style.left = scaleLenth*(i + 1);
innerText = "|";
}
}
}
function createTrack(){ //创建滑动条
var objBarContainsDiv;
objBarContainsDiv = this.document.createElement("<div style='position:absolute;left:0;top:0;height:16;width:11;z-index:2;'/>");
//创建矩形区域
var objBarTop = this.document.createElement("<div style='position:absolute;left:0;top:0;height:10;width:11;font-size:1px;border-top:solid 1px #999999;border-right:solid 1px #666666;border-left:solid 1px #cccccc;z-index:2;background:#cccccc;'>");
objBarTop = objBarContainsDiv.appendChild(objBarTop);
var objPointDiv;
var iScale = 0;
for(var i=0;i<6;i++){ //创建红色标识区域，用来指向刻度
objPointDiv = this.document.createElement("<div style='position:absolute;background:red;font-size:1px;z-index:2;border-right:solid 1px #990000;'>");
iScale = i + 1;
with(objPointDiv){
style.left = iScale;
style.top = parseInt(objBarTop.style.pixelHeight) + (iScale - 1);
if((parseInt(objBarTop.style.pixelWidth) - 2*iScale)<0){
break;
}
style.width = parseInt(objBarTop.style.pixelWidth) - 2*iScale;
}
objPointDiv = objBarContainsDiv.appendChild(objPointDiv);
}
return objBarContainsDiv;
}
function setPos(){ //单击滑动条时，设置滑动条位置
trackBeforeMove();
trackLevel.innerText = Math.round(parseInt(objTrackBar.style.left)*100/vaildLength) + "%";//显示刻度数
}
function trackBarBeforeMove(){ //移动滑动条前的准备
vLeft = window.event.x - objTrackBar.style.pixelLeft;
objTrackBar.style.background = "#dddddd";//背景
objTrackBar.setCapture(); //鼠标
objTrackBar.attachEvent("onmousemove", trackBeforeMove); //动态添加移动事件
}
function trackBeforeMove(){//滑块移动中
var leftPoint;
var pointDividLength;
var vMousePositionX;
if((event.x - objContainsDiv.offsetLeft - 8) > vaildLength || event.x<objContainsDiv.offsetLeft) return;
vMousePositionX = parseInt(event.x) - objContainsDiv.offsetLeft;
leftPoint = Math.floor(vMousePositionX/scaleLenth);//左边最近的点序号
pointDividLength = leftPoint*scaleLenth + scaleLenth/2;
window.status = "leftPoint:" + leftPoint + " [vMousePositionX:" + vMousePositionX + " pointDividLength:" + pointDividLength + "]";
if(vMousePositionX < pointDividLength){ //粘连到左边点
objTrackBar.style.left = leftPoint*scaleLenth;
}
if(vMousePositionX > pointDividLength){ //粘连到右边点
objTrackBar.style.left = (leftPoint+1)*scaleLenth;
}
if(parseInt(objTrackBar.style.left)>vaildLength){//移到了右边界
objTrackBar.style.left = vaildLength;
}
if(parseInt(objTrackBar.style.left)<0){ //移到了左边界
objTrackBar.style.left = 0;
}
trackLevel.innerText = Math.round(parseInt(objTrackBar.style.left)*100/vaildLength) + "%";
}
function trackBeforeMouseup(){ //滑动结束，解除绑定
if(parseInt(trackLevel.innerText.replace("%",""))>100){
objTrackBar.style.left = vaildLength;
trackLevel.innerText = "100%"; //不能超出最大刻度100
}else if(parseInt(trackLevel.innerText.replace("%",""))<0){
objTrackBar.style.left = 0;
trackLevel.innerText = "0%"; //不能小于最大刻度0
}
objTrackBar.detachEvent("onmousemove", trackBeforeMove);//撤销事件绑定
objTrackBar.style.background = "#cccccc"; //改变背景色
objTrackBar.releaseCapture(); //释放鼠标
}
</script>
</HEAD>
<BODY onload="contentLoad()">
<div id="trackDiv" style="position:absolute;left:100;top:50;border:solid 0px #cccccc;width:700;height:23;background:#dddddd;">
<hr id="trackDegree" size="1" color="#cccccc" style="position:absolute;top:16;height:3;border:groove 1px #eeeeee;background:#666666;z-index:1;">
</div>
<span id="trackLevel" style="position:absolute;left:100;top:30;width:50;font-size:9pt;color:red;">0%</span>
</BODY>
</HTML>
代码结束（此行不用复制） |
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