esempio:
<div id="pippo">blablabla</div>
<script>
alert(document.getElementById('pippo').offsetWidth);
alert(document.getElementById('pippo').offsetHeight);
</script>
esempio:
<div id="pippo">blablabla</div>
<script>
alert(document.getElementById('pippo').offsetWidth);
alert(document.getElementById('pippo').offsetHeight);
</script>
javascript: tutto attaccato