Javascript 如何使用javascript知道天气复选框是否选中
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how to know weather checkbox checked or not with javascript
提问by chetan
function checkAll(custId){
var id;
if(document.getElementById(custId).checked == true){
<%for (CustomerGroup custGroup : customerGroupList) {%>
if(custId==<%=custGroup.getCustomerGroupId()%>){
<%List<Account> list = accountDelegate
.findAccountEntityByGroupId(custGroup
.getCustomerGroupId());
for (Account account : list) {%>
id=<%=account.getAccountId()%>
document.getElementById(id).checked=true;
<%}%>
}
<%}%>
}else {
<%for (CustomerGroup custGroup : customerGroupList) {%>
if(custId==<%=custGroup.getCustomerGroupId()%>){
<%List<Account> list2 = accountDelegate
.findAccountEntityByGroupId(custGroup
.getCustomerGroupId());
for (Account account : list2) {%>
id=<%=account.getAccountId()%>
document.getElementById(id).checked=false;
<%}%>
}
<%}%>
}
}
Here I have passed custId as a id of checkbox.Problem here is if(document.getElementById(custId).checked == true
这里我传递了 custId 作为复选框的 id。这里的问题是 if(document.getElementById(custId).checked == true
each time this condition will evaluate to false and thus control goes on else part. so how can i know wether checkbox is cheched or not ?.
每次此条件将评估为假，因此控制继续进行其他部分。那么我怎么知道复选框是否被检查？
回答by Darin Dimitrov
The checkedproperty is what you need to use to verify if a checkbox is checked:
checked您需要使用该属性来验证是否选中了复选框：
<html>
<head>
<title>Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
window.onload = function() {
if (document.getElementById('test').checked) {
alert('the checkbox is checked');
}
};
</script>
</head>
<body>
<input id="test" name="test" type="checkbox" checked="checked" />
</body>
</html>
回答by deepak
<script language="javascript"><br>
var test=document.getElementById('test');<br>
if (test.checked == 1){<br>
alert("yes,Checked") ;<br>
}<br>
else<br>
{
<br>
alert("No,Please Check.")<br>
}<br>
</script>
