//»¬¶―ΓΕ
function tabit(btn, n){
	var idname = new String(btn.id);
	var s = idname.indexOf("_");
	var e = idname.lastIndexOf("_") + 1;
	var tabName = idname.substr(0, s);
	var id = parseInt(idname.substr(e, 1));
	for (i=0; i<n; i++){
		document.getElementById(tabName + "_div_" + i).style.display = "none"; 
		document.getElementById(tabName + "_btn_" + i).className = '';
	};	
	document.getElementById(tabName+"_div_"+id).style.display = "block"; 
	btn.className = "postion";
};