全選、不選和反選
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<html>
<meta charset="utf-8"/>
<head>
</head>
<body>
<form method="post" name="form1" id="form1" action="">
<tr>
<td width="62" align="center"><input type="checkbox" name="conn_id_1" id="conn_id_1" value="1"/></td>
<td>東邪</td>
<td>PHP</td>
<td>部門經(jīng)理</td>
<td>29</td>
</tr>
<br/><br/>
<tr>
<td width="62" align="center"><input type="checkbox" name="conn_id_2" id="conn_id_2" value="1"/></td>
<td>西毒</td>
<td>JAVA</td>
<td>部門經(jīng)理</td>
<td>29</td>
</tr>
<br/><br/>
<tr>
<td width="62" align="center"><input type="checkbox" name="conn_id_3" id="conn_id_3" value="1"/></td>
<td>南帝</td>
<td>VB</td>
<td>部門經(jīng)理</td>
<td>29</td>
</tr>
<br/><br/>
<tr>
<td width="62" align="center"><input type="checkbox" name="conn_id_4" id="conn_id_4" value="1"/></td>
<td>北丐</td>
<td>ASP</td>
<td>部門經(jīng)理</td>
<td>29</td>
</tr>
<br/><br/>
<tr>
<input type="button" onclick="uncheckAll(form1,status)" value="不選">
<input type="button" onclick="checkAll(form1,status)" value="全選">
<input type="button" onclick="switchAll(form1,status)" value="反選">
</tr>
</form>
<script>
function uncheckAll(form1,status){ //不選
var elements = document.getElementsByTagName('input'); //獲取input標(biāo)簽
for(var i=0;i<elements.length;i++){ //根據(jù)標(biāo)簽的長度執(zhí)行循環(huán)
if(elements[i].type == 'checkbox'){ //判斷對象中元素的類型
if(elements[i].checked==true){ //判斷當(dāng)checked的值為TURE時
elements[i].checked=false; //將checked賦值為FALSE
}
}
}
}
function checkAll(form1,status){ //全選
var elements = document.getElementsByTagName('input');
for(var i=0;i<elements.length;i++){
if(elements[i].type == 'checkbox'){
if(elements[i].checked==false){
elements[i].checked=true;
}
}
}
}
function switchAll(form1,status){ //反選
var elements = document.getElementsByTagName('input');
for(var i=0;i<elements.length;i++){
if(elements[i].type == 'checkbox'){
if(elements[i].checked==true){
elements[i].checked=false;
}else if(elements[i].checked==false){
elements[i].checked=true;
}
}
}
}
</script>
</body>
</html>
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