function MM_swapImgRestore() { // v3.
	var i, x, a = document.MM_sr;
	for (i = 0; a && i < a.length && (x = a[i]) && x.oSrc; i++)
		x.src = x.oSrc;
}
function MM_preloadImages() { // v3.0
	var d = document;
	if (d.images) {
		if (!d.MM_p)
			d.MM_p = new Array();
		var i, j = d.MM_p.length, a = MM_preloadImages.arguments;
		for (i = 0; i < a.length; i++)
			if (a[i].indexOf("#") != 0) {
				d.MM_p[j] = new Image;
				d.MM_p[j++].src = a[i];
			}
	}
}

function MM_findObj(n, d) { // v4.01
	var p, i, x;
	if (!d)
		d = document;
	if ((p = n.indexOf("?")) > 0 && parent.frames.length) {
		d = parent.frames[n.substring(p + 1)].document;
		n = n.substring(0, p);
	}
	if (!(x = d[n]) && d.all)
		x = d.all[n];
	for (i = 0; !x && i < d.forms.length; i++)
		x = d.forms[i][n];
	for (i = 0; !x && d.layers && i < d.layers.length; i++)
		x = MM_findObj(n, d.layers[i].document);
	if (!x && d.getElementById)
		x = d.getElementById(n);
	return x;
}

function MM_swapImage() { // v3.0
	var i, j = 0, x, a = MM_swapImage.arguments;
	document.MM_sr = new Array;
	for (i = 0; i < (a.length - 2); i += 3)
		if ((x = MM_findObj(a[i])) != null) {
			document.MM_sr[j++] = x;
			if (!x.oSrc)
				x.oSrc = x.src;
			x.src = a[i + 2];
		}
}

function check() {
	var err, re, r;
	var name = document.form1.loginname.value;
	if (name.length <= 0) {
		err = "请输入您的用户名！";
		alert(err);
		document.form1.loginname.focus();
		return false;
	}
	var password = document.form1.loginpwd.value;
	if (password.length <= 0) {
		err = "请输入您的密码！";
		alert(err);
		document.form1.loginpwd.focus();
		return false;
	}
	var randomCode = document.form1.randomCode.value;
	if (randomCode.length <= 0) {
		err = "请输入您的验证码！";
		alert(err);
		document.form1.randomCode.focus();
		return false;
	}
	return true;
}

function commit() {
	if (check()) {
		document.form1.submit();
	}
}