function menuslad(obj){
	var x=document.getElementById('m_0'+obj).style;
	if(x.display=='block'){
		x.display='none';
	}else{
		x.display='block';
	}
	for(var i=1; i<=3; i++ ){
		document.getElementById('m_0'+i).style.zIndex=10;
	}
	x.zIndex=100;
}