第1个回答 2016-05-09
var len=$("input[type=checkbox]:checked()");
if(len.length>0){
alert("有选中");
}else{
alert("没有选中");
}本回答被提问者采纳
if(len.length>0){
alert("有选中");
}else{
alert("没有选中");
}本回答被提问者采纳
第2个回答 2016-05-07
if($("#id").attr("checked")==true
第3个回答 2017-10-02
<!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>
<title></title>
</head>
<body>
<input type="checkbox" value="1" />
<input type="checkbox" value="2"/>
<input type="checkbox" value="3"/>
<input type="checkbox" value="4"/>
</body>
<script>
var checks = document.getElementsByTagName("input"), cnt = 0, count = 0;
for (var i = 0; i < checks.length; i++) {
if (checks[i].type == "checkbox") {
count += 1;
if (checks[i].checked == false) {
alert(checks[i].value);
}
}
}
</script>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<input type="checkbox" value="1" />
<input type="checkbox" value="2"/>
<input type="checkbox" value="3"/>
<input type="checkbox" value="4"/>
</body>
<script>
var checks = document.getElementsByTagName("input"), cnt = 0, count = 0;
for (var i = 0; i < checks.length; i++) {
if (checks[i].type == "checkbox") {
count += 1;
if (checks[i].checked == false) {
alert(checks[i].value);
}
}
}
</script>
</html>
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