var last = '';
var stat = 0;
function toggle(id){
//1:
	if (stat==0) {
		document.getElementById(id).style.display = 'block';
		stat = 1;
		last = id;
	}else if((stat==1)&&(last==id)){
		document.getElementById(last).style.display = 'none';
		stat = 0;
		last = id;
	}else{
		document.getElementById(last).style.display = 'none';
		document.getElementById(id).style.display = 'block';
		stat = 1;
		last = id;
	}
	document.tut.stat.value = stat;
	document.tut.Id.value = id;
	document.tut.last.value = last;
}