js中实现复选框的全选,全不选以及反选,分为两种情况:
(1)选中“请选择”前面的复选框实现全选,不选中“请选择”前面的复选框实现全不选
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<title>无标题文档</title>
</head>
<script>
function check_inter(){
var inters = document.getElementsByName("inter");
for(var i=0;i<inters.length;i++){
if(document.getElementById("cbox").checked==true){
inters[i].checked = true;
}else{
inters[i].checked = false;
}
}
}
</script> <body>
<input type="checkbox" id="cbox" value="" onclick="check_inter()"/>请选择</br>
<input type="checkbox" name="inter" value="下棋"/>下棋</br>
<input type="checkbox" name="inter" value="游戏"/>游戏</br>
<input type="checkbox" name="inter" value="看书"/>看书<br/>
</body>
</html>
(2)全选、全不选、反选三个按钮实现
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script>
//全选,全不选
function checkall(param){
var inters = document.getElementsByName("inter");
for(var i=0;i<inters.length;i++){
if(!param){
inters[i].checked = true;
}else{
inters[i].checked = false;
}
}
}
//反选
function uncheck(){
var inters = document.getElementsByName("inter");
for(var i=0;i<inters.length;i++){
inters[i].checked = !inters[i].checked;
}
} </script> <body>
<input type="checkbox" name="inter" value="下棋"/>下棋<br/>
<input type="checkbox" name="inter" value="游戏"/>游戏<br/>
<input type="checkbox" name="inter" value="看书"/>看书<br/>
<input type="button" onclick="checkall()" value="全选"/>
<input type="button" onclick="checkall('un')" value="全不选"/>
<input type="button" onclick="uncheck()" value="反选"/>
</body>
</html>