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<title>左右可拖动的内容显示区</title>
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#box ul{list-style-position:inside;margin:10px;}
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#top{background:green; float:left}
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function $(id) {
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var oBox = $("box"), oTop = $("top"), oBottom = $("bottom"), oLine = $("line");
oLine.onmousedown = function(e) {
var disX = (e || event).clientX;
oLine.left = oLine.offsetLeft;
document.onmousemove = function(e) {
var iT = oLine.left + ((e || event).clientX - disX);
var e=e||window.event,tarnameb=e.target||e.srcElement;
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<center>左右拖动红条改变显示区域宽度<span id="msg"></span></center>
<div id="box">
<div id="top">
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