check box if checked code example
Example 1: if checkbox is checked
if ($('#id_input').is(':checked')) { }
Example 2: check if checkbox is checked javascript
<script type=text/javascript>
function validate(){
if (remember.checked == 1){
alert("checked") ;
} else {
alert("You didn't check it! Let me check it for you.")
}
}
</script>
<input id="remember" name="remember" type="checkbox" onclick="validate()" />