image1=new Image();
image1.src="images/button_plus.gif";
function showblock(num) {
	if (document.getElementById('vita_content_'+num).style.display=='block') {
		document.getElementById('vita_content_'+num).style.display='none';
		document.getElementById('drop_button_'+num).src='images/button_plus.gif';
	} else {
		document.getElementById('vita_content_'+num).style.display='block';
		document.getElementById('drop_button_'+num).src='images/button_minus.gif';
	}
}