效果體驗：http:///keleyi/phtml/jquery/23.htm
完整代碼：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>jquery改變div寬高-</title>
<script type="text/javascript" src="http:///keleyi/pmedia/jquery/jquery-1.11.1.min.js"></script>
</head>
<body>
<div>
<input id="addwidthkeleyi" value="增加寬度" type="button" />
<input id="reducewidthkeleyi" value="減少寬度" type="button" />
<input id="addheightkeleyi" value="增加高度" type="button" />
<input id="reduceheightkeleyi" value="減少高度" type="button" />
<a href="http:///a/bjad/tar6g4m7.htm" target="_blank">原文</a> 點擊按鈕，注意下方div寬高的變化</div>
<div style="border:1px solid #999;width:200px;height:200px" id="keleyidiv"></div>
<script type="text/javascript">
$("#addwidthke"+"leyi").on("click", function () {
$("#keleyidiv").width($("#keley" + "idiv").width() + 50);
});
$("#reducewidthk" + "eleyi").on("click", function () {
$("#keleyidiv").width($("#kel"+"eyidiv").width() - 50);
});
$("#addheightkele" + "yi").on("click", function () {
$("#kel" + "eyidiv").height($("#keleyidiv").height() + 50);
});
$("#reduceheightkeley" + "i").on("click", function () {
$("#keleyidiv").height($("#keleyidiv").height() - 50);
});
</script>
</body>
</html>