jquery中获取id值方法小结

<div id="product_shift_out_{m}"> </div>
<script language = "javascript" type="text/javascript">
$(document).ready(function(){
name = $('div').eq(0).attr('id');
alert(name)
});
</script>

<table>
<tr><td>Header 1</td></tr>
<tr><td>Value 1</td></tr>
<tr><td>Value 2</td></tr>
</table>

$("tr:eq(1)")

[ <tr><td>Value 1</td></tr> ]

<script src="js/jquery.js"></script>
<script type="text/javascript">
<!--
$(document).ready(function(){
var len = $("#group span").size();//获取span标签的个数
var arr = [];
for(var index = 0; index < len-1; index++){//创建一个数字数组
arr[index] = index;
}
$.each(arr, function(i){//循环得到不同的id的值
var idValue = $("#group span").eq(i).attr("id");
if(idValue != ''){
alert(idValue);
}
});
});
//-->
</script>
<span id="group">
<span id="0_1">aaa,
<span group_id="0_1" class="icon_close">&nbsp;</span>
</span>
<span id="0_2">bbb,
<span group_id="0_2" class="icon_close">&nbsp;</span>
</span>
<span id="0_3">ccc,
<span group_id="0_3" class="icon_close">&nbsp;</span>
</span>
<span id="0_4">DDD,
<span group_id="0_4" class="icon_close">&nbsp;</span>
</span>
<span id="0_5">eee,
<span group_id="0_5" class="icon_close">&nbsp;</span>
</span>
</span>

这样就会得到你想要的所有的id:
0_1
0_2
0_3
0_4
0_5

$("#txt").attr("value",'');//清空内容
$("#txt").attr("value",'11');//填充内容

$("#chk1").attr("checked",'');//不打勾
$("#chk2").attr("checked",true);//打勾
if($("#chk1").attr('checked')==undefined) //判断是否已经打勾