<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>例子</title>
<style>
ul,li{margin:0;padding:0;}
body{font:14px/1.5 Arial;color:#666;}
#box{position:relative;width:600px;height:400px;border:2px solid #000;margin:10px auto;overflow:hidden;}
#box ul{list-style-position:inside;margin:10px;}
#top,#bottom{color:#FFF;height:200px;overflow:hidden;}
#top{background:green;}
#bottom{background:blue;}
#line{position:absolute;top:50%;width:100%;height:4px;overflow:hidden;margin-top:-2px;background:red;cursor:n-resize;}
</style>
<script>
function $(id) {
return document.getElementById(id)
}
window.onload = function() {
var oBox = $("box"), oTop = $("top"), oBottom = $("bottom"), oLine = $("line");
oLine.onmousedown = function(e) {
var disY = (e || event).clientY;
oLine.top = oLine.offsetTop;
document.onmousemove = function(e) {
var iT = oLine.top + ((e || event).clientY - disY);
var maxT = oBox.clientHeight - oLine.offsetHeight;
oLine.style.margin = 0;
iT < 0 && (iT = 0);
iT > maxT && (iT = maxT);
oLine.style.top = oTop.style.height = iT + "px";
oBottom.style.height = oBox.clientHeight - iT + "px";
return false
};
document.onmouseup = function() {
document.onmousemove = null;
document.onmouseup = null;
oLine.releaseCapture && oLine.releaseCapture()
};
oLine.setCapture && oLine.setCapture();
return false
};
};
</script>
</head>
<body>
<b>上下拖动红条改变显示区域高度</b>
<div id="box">
<div id="top">
<ul>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
<li>西安一大厦发生爆炸7人遇难31人受伤</li>
</ul>
</div>
<div id="bottom">
<ul>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
<li>京沪高铁因质量问题被召回动车拟16日恢复运营</li>
</ul>
</div>
<div id="line"></div>
</div>
</body>
</html>
