jQuery表格自动增加

<!DOCTYPE html>
<html dir="ltr" lang="zh-CN">
<head>
<meta charset="UTF-8" />
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<title>jQuery 表格自动增加</title>
<meta name="keywords" content="jQuery, 表格, table, 自动增加" />
<meta name="description" content="jQuery表格自动增加" />
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<style type="text/css">
table { width:800px; margin:50px auto; border-collapse:collapse; border-spacing:0; }
table tr, table th, table td { border:1px solid #ddd; font-size:12px; }
table tr td:first-child { width:30px; text-align:center; }
table td input { width:100%; height:100%; padding:5px 0;  border:0 none; }
table td input:focus { box-shadow:1px 1px 3px #ddd inset; outline:none; }
</style>
<body>
  

<table id="count">
	<tr><th>序号</th><th>姓名</th><th>金额[USD]</th><th>时间</th><th>项目</th><th>单位</th><th>备注</th></tr>
	<tr>
		<td>1</td>
		<td><input type="text" /></td>
		<td><input type="text" /></td>
		<td><input type="text" /></td>
		<td><input type="text" /></td>
		<td><input type="text" /></td>
		<td><input type="text" /></td>
	</tr>
</table>

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>

<script type="text/javascript">
$(function(){


/*	这是一种方法,但是不精简,不过很好理解,就像面向过程编写代码一样。
	var oTable = $("#count"), oTr = '', oInput = '', eEle = '';
	oTable.on('mouseover', function(){
		oTr = oTable.find('tr').last();
		oInput = oTr.find('input');
		eEle = oTr.clone();
		oInput.on('click', function(){
			var parent = $(this).parents('tr');
			if(oTr.index() == parent.index()){
				oTable.append(eEle);
			}
		});
	});
*/

//这是第二种方法,比较精简,要看对jQ的理解了。
var oTable = $("#count"), iNum = 1, eEle = '';
oTable.on('click', function(e){
	var target = e.target,
		oTr = $(target).closest('tr');
	if(oTr.index() == oTable.find('tr').last().index()){
		 iNum++;
		eEle = oTr.clone();
		eEle.find('td').eq(0).text(iNum);
	}
	oTable.append(eEle);
 });


});
</script>
 </body>
</html>

http://www.oschina.net/code/snippet_723890_27479

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