function TabCommon_ChangeShow(showIndex, totalIndex, tab_Pre, content_Pre)
{
	var i;
	for(i = 1; i <= totalIndex; i++)
	{
		changeBG(tab_Pre + i, "tab_common_not_chosen");
		changeBG(content_Pre + i, "disn");
	}
	changeBG(tab_Pre + showIndex, "tab_common_chosen");
	changeBG(content_Pre + showIndex, "disb");
}