win=(navigator.appVersion.indexOf('Win')!=-1)?true:false;
	if (win) {
		document.write('<link rel="stylesheet" href="../stylewin.css" type="text/css">');
	} else {
		document.write('<link rel="stylesheet" href="../stylemac.css" type="text/css">');
	} 

	ns4 = (document.layers)? true:false;
	ie4 = (document.all)? true:false;
	
	if(navigator.appVersion.charAt(0) >= "3") {
	var img = new Array(); //

	img[0] = new Image(); img[0].src = "../img/menu_e_message.gif";
	img[1] = new Image(); img[1].src = "../img/menu_e_conce.gif";
	img[2] = new Image(); img[2].src = "../img/menu_e_appli.gif";
	img[3] = new Image(); img[3].src = "../img/menu_e_judge.gif";
	img[4] = new Image(); img[4].src = "../img/menu_e_award.gif";
	img[5] = new Image(); img[5].src = "../img/menu_e_form.gif";
	img[6] = new Image(); img[6].src = "../img/menu_e_situation.gif";
	img[7] = new Image(); img[7].src = "../img/menu_e_event.gif";
	img[8] = new Image(); img[8].src = "../img/menu_e_award05.gif";

	img[10] = new Image(); img[10].src = "../img/menu_e_message_on.gif";
	img[11] = new Image(); img[11].src = "../img/menu_e_conce_on.gif";
	img[12] = new Image(); img[12].src = "../img/menu_e_appli_on.gif";
	img[13] = new Image(); img[13].src = "../img/menu_e_judge_on.gif";
	img[14] = new Image(); img[14].src = "../img/menu_e_award_on.gif";
	img[15] = new Image(); img[15].src = "../img/menu_e_form_on.gif";
	img[16] = new Image(); img[16].src = "../img/menu_e_situation_on.gif";
	img[17] = new Image(); img[17].src = "../img/menu_e_event_on.gif";
	img[18] = new Image(); img[18].src = "../img/menu_e_award05_on.gif";
	
	img[30] = new Image(); img[30].src = "../img/menu_e_home_on.gif";
	img[31] = new Image(); img[31].src = "../img/menu_e_home.gif";
	
	function main_menu(iName, iNum) {
			document.images[iName].src = img[iNum].src; 
		}
	}