function shadowPosition(sc,t) {
	sc.style.width = (t.offsetWidth + 30) + 'px';
	sc.style.height = (t.offsetHeight + 30) + 'px';
	sc.style.top = getAbsTop(t) + 'px';
	sc.style.left = getAbsLeft(t) + 'px';
	
	var els = sc.getElementsByTagName('img');
	for (var i = 0; i < els.length; i++) {
		el = els[i];
		if (el.className == 'v') {
		  el.style.height = (sc.offsetHeight - 60) + 'px';
		} else if (el.className == 'h') {
		  el.style.width = (sc.offsetWidth - 60) + 'px';
		} else if (el.className == 'bl') {
		  el.style.top = (sc.offsetHeight - 30) + 'px';
		} else if (el.className == 'br') {
		  el.style.top = (sc.offsetHeight - 30) + 'px';
		}
	}
}