function ChangeStyle(id)
{
     var obj_td = document.getElementById('main_td_' + id);
     var obj_a = document.getElementById('main_a_' + id);

    if(obj_td.className == 'main_menu')
    {
          obj_td.className = 'main_menu_1';
          obj_a.className = 'main_menu_1';
     }
     else
     {          
          obj_td.className = 'main_menu';
          obj_a.className = 'main_menu';
     }
}

function setCookie (name, value, expires, path, domain, secure) {
      document.cookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}
function getCookie(name) {
	var cookie = " " + document.cookie;
	var search = " " + name + "=";
	var setStr = null;
	var offset = 0;
	var end = 0;
	if (cookie.length > 0) {
		offset = cookie.indexOf(search);
		if (offset != -1) {
			offset += search.length;
			end = cookie.indexOf(";", offset)
			if (end == -1) {
				end = cookie.length;
			}
			setStr = unescape(cookie.substring(offset, end));
		}
	}
	return(setStr);
}