function _ShowLoginBox()
{ 
	screenDark();		
	$('menu-div').style.display = "block";
	var x =(document.body.clientWidth-$('menu-div').offsetWidth)/2;		
	var y =(document.body.clientHeight-$('menu-div').offsetHeight)/2+document.body.scrollTop;
	$('menu-div').style.position = "absolute";
	$('menu-div').style.left = x;
	$('menu-div').style.top = y;	
	$('menu-div').style.zIndex = "1000";
	change_style('select', 'hidden');
}
	
function screenDark()
{
	if ($('screen')) 
	{
		var screen = $('screen');
	}
	if (!screen) 
	{
		var screen = document.createElement("div");
		document.body.appendChild(screen);
	}
	screen.id = "screen";
	screen.style.cssText = "position:absolute;top:0px;left:0px;background:#000;";
	screen.style.width = document.body.offsetWidth +"px";
	screen.style.height = document.body.scrollHeight;
	screen.style.zIndex = "100";
	if(document.all)
	{
		screen.style.filter='Alpha(Opacity=45)';
	}
	else
	{
		screen.style.MozOpacity='0.45'
	}
}

function closeLog(box)
{
	if ($('password')) {
		$('password').value = '';
	}
	$(box).style.display='none';	
	change_style('select', 'visible');
}

function showSuccessInfo()
{
    window.setTimeout('closedialog()', 1000);
    closedialog();
}

function change_style(c_tagname, c_property)
{
	var obj = document.getElementsByTagName(c_tagname);
	for (var i=0; i<obj.length; i++)
	{
		obj[i].style.visibility = c_property;
	}
}

function closedialog()
{
	closeLog('menu-div');
    closeLog('screen');
}

function $(_sId){
	return document.getElementById(_sId);
}