js解决checkbox全选和反选的问题
<!DOCTYPEhtml><html><head><metacharset='utf8'/><title>网页中的运行代码功能</title><scripttype="...
<!DOCTYPE html>
<html>
<head>
<meta charset='utf8' />
<title>网页中的运行代码功能</title>
<script type="text/javascript">
function runCode(oCode) {
var win = window.open('', "_blank", '');
win.document.open('text/html', 'replace');
win.opener = null
win.document.write(oCode.value);
win.document.close();
}
</script>
</head>
<body>
<textarea id="code1" rows="10" cols="95">
<!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>js点击checkbox实现全选效果</title>
<script type="text/javascript">
function DoCheck()
{
var ch=document.getElementsByName("choose");
if(document.getElementsByName("allChecked")[0].checked==true)
{
for(var i=0;i<ch.length;i++)
{
ch[i].checked=true;
}
}else{
for(var i=0;i<ch.length;i++)
{
ch[i].checked=false;
}
}
}
</script>
</head>
<body>
请选择爱好：<br/>
<input type="checkbox" name="choose">跳舞
<input type="checkbox" name="choose">跳水
<input type="checkbox" name="choose"/>跳棋
<input type="checkbox" name="choose"/>跑步<br/>
<input type="checkbox" name="allChecked" id="allChecked" onclick="DoCheck()"/>全选/取消
</body>
</html>
</textarea>
<br>
<input type="button" value="运行代码" onclick="runCode(code1)">
</body>
</html> 展开
<html>
<head>
<meta charset='utf8' />
<title>网页中的运行代码功能</title>
<script type="text/javascript">
function runCode(oCode) {
var win = window.open('', "_blank", '');
win.document.open('text/html', 'replace');
win.opener = null
win.document.write(oCode.value);
win.document.close();
}
</script>
</head>
<body>
<textarea id="code1" rows="10" cols="95">
<!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>js点击checkbox实现全选效果</title>
<script type="text/javascript">
function DoCheck()
{
var ch=document.getElementsByName("choose");
if(document.getElementsByName("allChecked")[0].checked==true)
{
for(var i=0;i<ch.length;i++)
{
ch[i].checked=true;
}
}else{
for(var i=0;i<ch.length;i++)
{
ch[i].checked=false;
}
}
}
</script>
</head>
<body>
请选择爱好：<br/>
<input type="checkbox" name="choose">跳舞
<input type="checkbox" name="choose">跳水
<input type="checkbox" name="choose"/>跳棋
<input type="checkbox" name="choose"/>跑步<br/>
<input type="checkbox" name="allChecked" id="allChecked" onclick="DoCheck()"/>全选/取消
</body>
</html>
</textarea>
<br>
<input type="button" value="运行代码" onclick="runCode(code1)">
</body>
</html> 展开
1个回答
展开全部
<script>
function SelectAll() {
var checkboxs=document.getElementsByName("choose");
for (var i=0;i<checkboxs.length;i++) {
var e=checkboxs[i];
e.checked=!e.checked;
}
}
</script>
<input type="checkbox" name="choose">跳舞
<input type="checkbox" name="choose">跳水
<input type="checkbox" name="choose"/>跳棋
<input type="checkbox" name="choose"/>跑步<br/>
<input type="checkbox" name="allChecked" id="allChecked" onclick="SelectAll()"/>全选/取消
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