图片与JavaScript配合做出个性滚动条_页面背景

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>图片与JavaScript配合做出个性滚动条</title> <style type="text/css"> * { margin:0; padding:0; } body { margin:20px 0 400px 20px; font:12px Arial; } h1 { font-size:14px; } ol { margin:20px; line-height:160%; } #out { position:relative; width:500px; height:300px; margin:100px 0 100px 80px; border:1px solid #369; overflow:hidden; } #content { width:520px; height:100%; overflow:auto; -moz-user-select:none; } #scrollBar,#scrollBarHandle,.scroll_bar_top,.scroll_bar_top_a,.scroll_bar_bottom,.scroll_bar_bottom_a { background-image:url(http://files.jb51.net/demoimg/200910/un_bg_scrollBar.gif); } #scrollBar { position:absolute; top:0; right:0; z-index:9; width:14px; height:100%; background-repeat:repeat-y; background-position:-42px 0; float:left; } #scrollBarTop,#scrollBarHandle,#scrollBarBottom { position:absolute; left:0; cursor:default; } #scrollBarTop,#scrollBarBottom { width:100%; height:14px; color:#fff; text-align:center; } #scrollBarTop { top:0; } #scrollBarBottom { bottom:0; } #scrollBarHandle { width:100%; background-repeat:repeat-y; background-position:-28px 0; } .scroll_bar_top { background-position:0 0; } .scroll_bar_top_a { background-position:-14px 0; } .scroll_bar_bottom { background-position:-56px 0; } .scroll_bar_bottom_a { background-position:-70px 0; } </style> <div id="out"> <div id="content"> fsdfs<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br>11111111<br>fsdfs<br> </div> <div id="scrollBar"> <div id="scrollBarTop" class="scroll_bar_top"></div> <div id="scrollBarHandle"></div> <div id="scrollBarBottom" class="scroll_bar_bottom"></div> </div> </div> <script> var ximen = { $:function(o){ return document.getElementById(o); }, getStyle:function(o) { return o.currentStyle||document.defaultView.getComputedStyle(o,null); }, getOffset:function(o) { var t = o.offsetTop,h = o.offsetHeight; while(o = o.offsetParent) { t += o.offsetTop; } return { top:t, height:h }; }, bind:function(o,eType,fn) { if(o.addEventListener) { o.addEventListener(eType,fn,false); } else if(o.attachEvent) { o.attachEvent("on" + eType,fn); } else { o["on" + eType] = fn; } }, unbind:function(o,eType,fn) { if(o.removeEventListener) { o.removeEventListener(eType,fn,false); } else if(o.detachEvent) { o.detachEvent("on" + eType,fn); } else { o["on" + eType] = fn; } }, stopPropagate:function(e) { if(e && e.stopPropagation) { e.stopPropagation(); } else { window.event.cancelBubble = true; } return false; }, stopDefault:function(e) { e = e || window.event; e.stopPropagation && (e.preventDefault(),e.stopPropagation()) || (e.cancelBubble = true,e.returnValue = false); } }; (function(){ var myScrollDown,myScrollUp,scrollBarMouseDown,scrollBarMouseUp,relY, out = ximen.$("out"), content = ximen.$("content"), scrollBar = ximen.$("scrollBar"), scrollBarTop = ximen.$("scrollBarTop"), scrollBarHandle = ximen.$("scrollBarHandle"), scrollBarBottom = ximen.$("scrollBarBottom"), scrollBarUpHeight = parseInt(ximen.getStyle(scrollBarTop).height), scrollBarBottomHeight = parseInt(ximen.getStyle(scrollBarBottom).height), contentScrollHeight = content.scrollHeight,//将content.scrollHeight赋一次值,解决IE6下scrollHeight需调用两次的bug scrollBarHandleHeight = parseInt(content.offsetHeight/content.scrollHeight * (scrollBar.offsetHeight - scrollBarUpHeight - scrollBarBottomHeight)), setScrollBarHandle = function() {//当内容超多时设置拖拽条子的最小高度 scrollBarHandle.style.top = scrollBarUpHeight + "px"; if(scrollBarHandleHeight > 15) { scrollBarHandle.style.height = scrollBarHandleHeight + "px"; } else { scrollBarHandleHeight = 15; scrollBarHandle.style.height = "15px"; } }, clearAllInterval = function() { clearInterval(myScrollDown); clearInterval(myScrollUp); clearInterval(scrollBarMouseDown); }, forMousemove = function(e) { var e = e || window.event; content.scrollTop = (e.clientY - relY - scrollBarUpHeight)/(scrollBar.offsetHeight - scrollBarHandleHeight - scrollBarUpHeight - scrollBarBottomHeight)*(content.scrollHeight - content.offsetHeight); }, forMouseDown = function(event){ var et = event.target || event.srcElement; relY = event.clientY - et.offsetTop; ximen.bind(document,"mousemove",forMousemove); }, scrollDir = function(e) { var e = e || window.event,eDir; //设置滚轮事件,e.wheelDelta与e.detail分别兼容IE、W3C，根据返回值的正负来判断滚动方向 if(e.wheelDelta) { eDir = e.wheelDelta/120; } else if(e.detail) { eDir = -e.detail/3; } if(eDir > 0) { content.scrollTop -= 80; } //步长设80像素a比较接近window滚动条的滚动速度 else { content.scrollTop += 80; } ximen.stopDefault(e); }, scrollBarClick = function(e) { var e = e || window.event, mStep = scrollBar.offsetHeight, documentScrollTop = document.documentElement.scrollTop, hOffset = ximen.getOffset(scrollBarHandle); if(documentScrollTop + e.clientY < hOffset.top) { scrollBarMouseDown = setInterval(function(){ content.scrollTop -= 15; },10); } else if(documentScrollTop + e.clientY > hOffset.top + hOffset.height) { scrollBarMouseDown = setInterval(function(){ content.scrollTop += 15; },10); } }; setScrollBarHandle(); ximen.bind(content,"scroll",function(){ scrollBarHandle.style.top = content.scrollTop/(content.scrollHeight - content.offsetHeight) * (scrollBar.offsetHeight - scrollBarHandleHeight - scrollBarUpHeight - scrollBarBottomHeight) + scrollBarUpHeight + "px"; }); ximen.bind(scrollBarBottom,"mousedown",function(){ myScrollDown = setInterval(function(){ content.scrollTop += 15; },10); }); ximen.bind(scrollBarTop,"mousedown",function(){ myScrollUp = setInterval(function(){ content.scrollTop -= 15; },10); }); ximen.bind(scrollBarBottom,"mouseup",clearAllInterval); ximen.bind(scrollBarBottom,"mouseout",clearAllInterval); ximen.bind(scrollBarTop,"mouseup",clearAllInterval); ximen.bind(scrollBarTop,"mouseout",clearAllInterval); ximen.bind(scrollBarHandle,"mousedown",forMouseDown); ximen.bind(document,"mouseup",function(){ ximen.unbind(document,"mousemove",forMousemove); ximen.unbind(scrollBarHandle,"mousemove",forMousemove); }); ximen.bind(out,"selectstart",function(){ return false; }); ximen.bind(out,"select",function(){ document.selection.empty(); }); ximen.bind(out,"mousewheel",scrollDir); ximen.bind(out,"DOMMouseScroll",scrollDir); ximen.bind(scrollBar,"mousedown",scrollBarClick); ximen.bind(scrollBar,"mouseup",clearAllInterval); ximen.bind(scrollBarTop,"click",function(event){ ximen.stopPropagate(event); }); ximen.bind(scrollBarTop,"mousedown",function(){ scrollBarTop.className = "scroll_bar_top_a"; }); ximen.bind(scrollBarTop,"mouseup",function(){ scrollBarTop.className = "scroll_bar_top"; }); ximen.bind(scrollBarTop,"mouseout",function(){ scrollBarTop.className = "scroll_bar_top"; }); ximen.bind(scrollBarBottom,"click",function(event){ ximen.stopPropagate(event); }); ximen.bind(scrollBarBottom,"mousedown",function(){ scrollBarBottom.className = "scroll_bar_bottom_a"; }); ximen.bind(scrollBarBottom,"mouseup",function(){ scrollBarBottom.className = "scroll_bar_bottom"; }); ximen.bind(scrollBarBottom,"mouseout",function(){ scrollBarBottom.className = "scroll_bar_bottom"; }); })(); </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]