function chgCurInfo(id){
	var el = document.getElementById(id);
	for (var i = 0 ; i < el.childNodes.length ; i ++ ){
		if (el.childNodes[i].nodeName == 'DIV'){
			el.childNodes[i].onmouseover = function(){
				var obj = this.parentNode;
				for (var j = 0 ; j < obj.childNodes.length ; j ++ ){
					if (obj.childNodes[j].nodeName == 'DIV'){
						obj.childNodes[j].className = 'main_off';
						document.getElementById(obj.childNodes[j].id.replace(/main(_[\d]+_[\d]+)/gi,'area$1')).style.display = 'none';
					}
					this.className = 'main_on';
					document.getElementById(this.id.replace(/main(_[\d]+_[\d]+)/gi,'area$1')).style.display = 'block';
				}
			}
		}
	}
}