var V=parseInt(navigator.appVersion);
var B=(navigator.userAgent+navigator.appName).toLowerCase();
var NS4=(B.indexOf("netscape")!=-1&&V==4);
var IE=(B.indexOf("microsoft")!=-1);


function Position(object)
{
	var m_elem = object;

	this.GetElementWidth = GetElementWidth;
	function GetElementWidth()
	{
		var elem;
		if(typeof(m_elem) == "object")
		{
			elem = m_elem;
		}
		else
		{
			elem = document.getElementById(m_elem);
		}
		return parseInt(elem.offsetWidth);
	}

	this.GetElementHeight = GetElementHeight;
	function GetElementHeight()
	{
		var elem;
		if(typeof(m_elem) == "object")
		{
			elem = m_elem;
		}
		else
		{
			elem = document.getElementById(m_elem);
		}
		return parseInt(elem.offsetHeight);
	}

	this.GetElementLeft = GetElementLeft;
	function GetElementLeft()
	{
		var x = 0;
		var elem;		
		if(typeof(m_elem) == "object")
			elem = m_elem;
		else
			elem = document.getElementById(m_elem);
			
		while (elem != null)
		{
			x += elem.offsetLeft;
			elem = elem.offsetParent;
		}
		return parseInt(x);
	}
	
	this.GetElementRight = GetElementRight;
	function GetElementRight()
	{
		return GetElementLeft(m_elem) + GetElementWidth(m_elem);
	}

	this.GetElementTop = GetElementTop;
	function GetElementTop()
	{
		var y = 0;
		var elem;
		if(typeof(m_elem) == "object")
		{
			elem = m_elem;
		}
		else
		{
			elem = document.getElementById(m_elem);
		}
		while (elem != null)
		{
			y+= elem.offsetTop;
			elem = elem.offsetParent;
		}
		return parseInt(y);
	}

	this.GetElementBottom = GetElementBottom;
	function GetElementBottom()
	{
	    return GetElementTop(m_elem) + GetElementHeight(m_elem);
	}	
}

function SetElementProperty(elemId, property, value)
	{
		var elem = null;

		if(typeof(elemId) == "object")
			elem = elemId;
		else
			elem = document.getElementById(elemId);
			
		if((elem != null) && (elem.style != null))
		{
			elem = elem.style;
			elem[property] = value;
		}
	}	

function Exibe_EnvieAmigo(imgEnvieAmigo, Popup_EnvieAmigo)
{
	if( Popup_EnvieAmigo.style.display == "none")
	{	
		Popup_EnvieAmigo.style.display = "";
		var pos = new Position(imgEnvieAmigo);
		
		Popup_EnvieAmigo.style.top = pos.GetElementTop() + pos.GetElementHeight();	
		Popup_EnvieAmigo.style.left = pos.GetElementLeft();	
	}
	else
		Popup_EnvieAmigo.style.display = "none";
}

function Fecha_EnvieAmigo(Popup_EnvieAmigo)
{
	if( Popup_EnvieAmigo.style.display == "")
	{	
		Popup_EnvieAmigo.style.display = "none";
	}
	else
		Popup_EnvieAmigo.style.display = "none";
}