function showProductDefault(e, el) {
	var targ = null;
	if (!e) e = window.event;
	if (e.target) targ = e.target;
	if (e.srcElement) targ = e.srcElement;
	if (targ.id == el.id)
		showSegment('product_1');
}

function showProductSegment(segName) {
	var seg=new Array("product_1","product_2","product_3","product_4");
	for (var i in seg){
		if(seg[i]!=segName){
			document.getElementById(seg[i]).style.visibility='hidden';
			document.getElementById(seg[i]).style.display='none';
		}
	}
	document.getElementById(segName).style.visibility='visible';
	document.getElementById(segName).style.display='block';
	return false;
}