function $(obj){
	return document.getElementById(obj);
}

function over_1(cur) {

	for(var i=1; i<100; i++) {
		var tmpId = cur.replace(/(tag_\d+_)\d+/, '$1'+i);
		var tmpId_1 = cur.replace(/tag(_\d+_)\d+/, 'con$1'+i);
		
		var obj = document.getElementById(tmpId);
		if (!obj) break;
		
		if (tmpId == cur) {
			obj.className = "current";
			document.getElementById(tmpId_1).style.display = "block";
		} else {
			obj.className="";
			document.getElementById(tmpId_1).style.display = "none";
		}
	}
}