codice:
<script language="javascript">
function check()
{
var checkBx = document.getElementById("Lines_Check") ;
if ( checkBx.checked == true) {
lines= true;
alert('lines ='+lines) ;
}else{
lines=false;
alert('lines ='+lines) ;
}
}
</script>

</head>
<body>
<input type="checkbox" id="Lines_Check" checked="checked" class="styled" /> Lines</p>


<input type="button" value="OK" onclick="check()" />

</body>