function ShowLogin(act){

	mask = document.getElementById("LoginFormMask");
	logf = document.getElementById("LoginForm");

	if (act==1)
	{
		mask.style.display = "block";

		if (b.opera)
			mask.style.background = 'none';
		var h = self.document.body.offsetHeight;
		var w = self.document.body.offsetWidth;
		mask.style.height = h + 'px';
		logf.style.overflow = 'auto';
		logf.style.display = 'block';
		logf.style.left = (w - logf.offsetWidth)/2 + 'px';
		if(!b.moz){
			logf.focus();
			logf.style.outline = 'none';
		}
		vis = 'hidden';
		logf.redirect.value = document.location.href;
		setTimeout('document.LoginForm.login.focus();', 100);
	}else{
		vis = 'visible';
		logf.style.display = 'none';
		mask.style.display = 'none';
	}

	setVisibility('EMBED', vis);
	setVisibility('OBJECT', vis);
	setVisibility('IFRAME', vis);
	setVisibility('SELECT', vis);

	return false;
}

function setVisibility(tag, value)
{
	var obj = document.getElementsByTagName(tag);
	for (var i = 0; i < obj.length; i++) {
		obj[i].style.visibility = value;
	}
	return true;
}