function LTrim(s) {
	return s.replace(/^\s+/g,"");
}

function RTrim(s) {
	return s.replace(/\s+$/g,"");
}

function Trim(s) {
	return LTrim(RTrim(s));
}

function Len(s) {
	var s1 = Trim(s);
	return s1.length;
}

function CheckNum(s) {
    if (Len(s) == 0) return false;

    for (i=0; i < s.length; i++) {
        if (!(s.charAt(i) >= "0" && s.charAt(i) <= "9")) 
            return false;
	}

    return true;
}

function CheckStrNum(s) {
    if (Len(s) == 0) return false;

    for (i=0; i < s.length; i++) {
        if (!((s.charAt(i) >= "a" && s.charAt(i) <= "z") ||
	      (s.charAt(i) >= "A" && s.charAt(i) <= "Z") ||
	      (s.charAt(i) >= "0" && s.charAt(i) <= "9")))
            return false;
	}

    return true;
}

function CheckExceptStrNum(s) {
    if (Len(s) == 0) return false;

    for (i=0; i < s.length; i++) {
        if (!((s.charAt(i) >= "a" && s.charAt(i) <= "z") ||
	      (s.charAt(i) >= "A" && s.charAt(i) <= "Z") ||
	      (s.charAt(i) >= "0" && s.charAt(i) <= "9") ||
	      (s.charAt(i) == "_"))) 
            return false;
	}

    return true;
}

function CheckSpace(s) {
    if (Len(s) == 0) return false;

    for (i=0; i < s.length; i++) {
        if (s.charAt(i) == " ") 
            return false;
	}

    return true;
}

function namosw_exchange_src() { 
	str = namosw_exchange_src.arguments[0];
	str = (navigator.appName == 'Netscape') ? 'document.' + str : 'document.all.' + str;
	img = eval(str);
	if (img) {
		if (img.ori_src == null) {
			img.ori_src = img.src;
			img.src     = namosw_exchange_src.arguments[1];
		} else {
			var temp    = img.src;
			img.src     = img.ori_src;
			img.ori_src = temp;
		}
	} 
}

function namosw_preload_img() { 
	var img_list = namosw_preload_img.arguments;
	if (document.preloadlist == null) document.preloadlist = new Array();

	var top = document.preloadlist.length;

	for (var i=0; i < img_list.length; i++) {
		document.preloadlist[top+i]     = new Image;
		document.preloadlist[top+i].src = img_list[i];
	} 
}

function OpenClub() {
	window.open('http://cafe.dharmanet.net/')
//	club_win = window.open('http://cafe.dharmanet.net/', 'club_win');
//	club_win.moveTo(0, 0);
//	club_win.resizeTo(screen.availWidth, screen.availHeight);
//	club_win.focus();
}