var obvious = null;
function unfold(){
	if(obvious == null){
		document.getElementById('leadcnt').style.display = 'none';	
		document.getElementById('unfold').style.display = 'block';
		obvious = 1;	
	} else {
		document.getElementById('leadcnt').style.display = 'block';	
		document.getElementById('unfold').style.display = 'none';	
		obvious = null;
	}
	return false;
}
	
window.onload = unfold;