插件名称命名为:jquery.tableresize.js，代码如下：
/*
Writen by mlcactus, 2014-11-24
这是我封装的一个jquery插件，能够使table的各列可以左右拉伸，从而使宽度变小或变大
用法：$("#table_id").tableresize();
*/
(function ($) {
$.fn.tableresize = function (options) {
var defaults = {
//当table的宽度到达默认最大值时，是否继续增大以至于出现横向滚动条
resizeTable: true
};
var opts = $.extend(defaults, options);
var _document = $("body");
//设定user-select样式，防止内容被选中
var set_user_select = function (jqueryobj, val) {
jqueryobj.css("-moz-user-select", val).css("-webkit-user-select", val).css("-ms-user-select", val);
};
$(this).each(function () {
if (!$.tableresize) {
$.tableresize = {};
}
var _table = $(this);
//设定ID
var id = _table.attr("id") || "tableresize_" + (Math.random() * 100000).toFixed(0).toString();
var tr = _table.find("tr").first(), ths = tr.children(), _firstth = ths.first();
//设定临时变量存放对象
var cobjs = $.tableresize[id] = {};
cobjs._currentObj = null, cobjs._currentLeft = null;
ths.mousemove(function (e) {
var _this = $(this);
var left = _this.offset().left, top = _this.offset().top, width = _this.outerWidth(), height = _this.outerHeight(), right = left + width, bottom = top + height, pageX = e.pageX, pageY = e.pageY;
var leftside = !_firstth.is(_this) && Math.abs(left - pageX) <= 5, rightside = Math.abs(right - pageX) <= 5;
if (cobjs._currentLeft || pageY > top && pageY < bottom && (leftside || rightside)) {
_document.css("cursor", "e-resize");
set_user_select(_table, "none");
if (!cobjs._currentLeft) {
if (leftside) {
cobjs._currentObj = _this.prev();
}
else {
cobjs._currentObj = _this;
}
}
}
else {
_document.css("cursor", "auto");
cobjs._currentObj = null;
}
});
ths.mouseout(function (e) {
if (!cobjs._currentLeft) {
cobjs._currentObj = null;
_document.css("cursor", "auto");
set_user_select(_table, "auto");
}
});
_document.mousedown(function (e) {
if (cobjs._currentObj) {
cobjs._currentLeft = e.pageX;
}
else {
cobjs._currentLeft = null;
}
});
_document.mouseup(function (e) {
if (cobjs._currentLeft) {
var changeWidth = e.pageX - cobjs._currentLeft;
cobjs._currentObj.width(cobjs._currentObj.width() + changeWidth);
if (opts.resizeTable) {
_table.width(_table.width() + changeWidth);
}
}
cobjs._currentObj = null;
cobjs._currentLeft = null;
_document.css("cursor", "auto");
set_user_select(_table, "auto");
});
});
};
})(jQuery);
页面代码为：
<!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 runat="server">
<title></title>
<style type="text/css" >
td{ text-align:center;}
</style>
<script type="text/javascript" src="script/jquery-1.10.2.js"></script>
<script type="text/javascript" src="script/jquery.tableresize.js"></script>
<script type="text/javascript">
$(document).ready(function () {
//该设置使table达到默认最大宽度时，将不再继续变宽
var ops = { resizeTable: false };
//使两张table同时支持左右拉伸
$("table").tableresize(ops);
});
</script>
</head>
<body>
表格1<br/>
<table cellspacing="0" border="1" style="border-collapse:collapse;" rules="all">
<tbody><tr>
<td style="200px;">ID</td><td style="200px;">名字</td><td style="200px;">年纪</td><td style="200px;">地址</td><td style="200px;">电话</td>
</tr><tr>
<td>22</td><td>Name:44</td><td>Age:23</td><td>Address:47</td><td>Phone:15</td>
</tr><tr>
<td>28</td><td>Name:42</td><td>Age:68</td><td>Address:30</td><td>Phone:50</td>
</tr><tr>
<td>29</td><td>Name:63</td><td>Age:48</td><td>Address:90</td><td>Phone:76</td>
</tr>
</tbody>
</table>
<br/>表格2<br/>
<table cellspacing="0" border="1" style="border-collapse:collapse;" rules="all">
<tbody><tr>
<td style="200px;">ID</td><td style="200px;">名字</td><td style="200px;">年纪</td><td style="200px;">地址</td><td style="200px;">电话</td>
</tr><tr>
<td>22</td><td>Name:44</td><td>Age:23</td><td>Address:47</td><td>Phone:15</td>
</tr><tr>
<td>28</td><td>Name:42</td><td>Age:68</td><td>Address:30</td><td>Phone:50</td>
</tr>
</tbody></table>
</body>
</html>