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JS-DOM操作应用高级（一）

2015-03-05 22:30 471 查看

表格应用--tBodies tHead tFoot rows cells

<title>无标题文档</title>
<script>
window.onload=function ()
{
var oTab=document.getElementById('tab1');
//    alert(oTab.getElementsByTagName('tbody')[0].getElementsByTagName('tr')[1].getElementsByTagName('td')[1].innerHTML);
alert(oTab.tBodies[0].rows[1].cells[1].innerHTML);
}
</script>
</head>

<body>
<table id="tab1" border="1" width="500">
<thead>
<td>ID</td>
<td>姓名</td>
<td>年龄</td>
</thead>
<tbody>
<tr>
<td>1</td>
<td>blue</td>
<td>23</td>
</tr>
<tr>
<td>2</td>
<td>张三</td>
<td>24</td>
</tr>
<tr>
<td>3</td>
<td>李四</td>
<td>25</td>
</tr>
<tr>
<td>4</td>
<td>王五</td>
<td>26</td>
</tr>
</tbody>
</table>
</body>

隔行变色，选中高亮

<title>无标题文档</title>
<script>
window.onload=function ()
{
var oTab=document.getElementById('tab1');
var oldColor='';

for(var i=0;oTab.tBodies[0].rows.length;i++)
{
oTab.tBodies[0].rows[i].onmouseover=function ()
{
oldColor=this.style.background;
this.style.background='yellow';
}
oTab.tBodies[0].rows[i].onmouseout=function ()
{
this.style.background=oldColor;
}
if(i%2)
{
oTab.tBodies[0].rows[i].style.background='';
}
else
{
oTab.tBodies[0].rows[i].style.background='green';
}
}
}
</script>
</head>

<body>
<table id="tab1" border="1" width="500">
<thead>
<td>ID</td>
<td>姓名</td>
<td>年龄</td>
</thead>
<tbody>
<tr>
<td>1</td>
<td>blue</td>
<td>23</td>
</tr>
<tr>
<td>2</td>
<td>张三</td>
<td>24</td>
</tr>
<tr>
<td>3</td>
<td>李四</td>
<td>25</td>
</tr>
<tr>
<td>4</td>
<td>王五</td>
<td>26</td>
</tr>
</tbody>
</table>
</body>

添加、删除一行，还有id号的处理（一般ID号不复用，删除了就不再用了）

<title>无标题文档</title>
<script>
window.onload=function ()
{
var oTab=document.getElementById('tab1');

var oBtn=document.getElementById('btn1');
var oName=document.getElementById('name');
var oAge=document.getElementById('age');
var id=oTab.tBodies[0].rows.length+1;

oBtn.onclick=function ()
{
var oTr=document.createElement('tr');

var oTd=document.createElement('td');
oTd.innerHTML=id++;
oTr.appendChild(oTd);

var oTd=document.createElement('td');
oTd.innerHTML=oName.value;
oTr.appendChild(oTd);

var oTd=document.createElement('td');
oTd.innerHTML=oAge.value;
oTr.appendChild(oTd);

var oTd=document.createElement('td');
oTd.innerHTML='<a href="javascript:;">删除</a>';
oTr.appendChild(oTd);

oTd.getElementsByTagName('a')[0].onclick=function ()
{
oTab.tBodies[0].removeChild(this.parentNode.parentNode);
}

oTab.tBodies[0].appendChild(oTr);
}
}
</script>
</head>

<body>
姓名：<input id="name" type="text"/>
年龄：<input id="age" type="text"/>
<input id="btn1" type="button" value="添加"/>
<table id="tab1" border="1" width="500">
<thead>
<td>ID</td>
<td>姓名</td>
<td>年龄</td>
<td>操作</td>
</thead>
<tbody>
<tr>
<td>1</td>
<td>blue</td>
<td>23</td>
<td></td>
</tr>
<tr>
<td>2</td>
<td>张三</td>
<td>24</td>
<td></td>
</tr>
<tr>
<td>3</td>
<td>李四</td>
<td>25</td>
<td></td>
</tr>
<tr>
<td>4</td>
<td>王五</td>
<td>26</td>
<td></td>
</tr>
</tbody>
</table>
</body>

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