function exibe(id,ac) {
	if (ac==true)
	{
		document.getElementById(id).style.display = "inline";
	}
	else
	{
		document.getElementById(id).style.display = "none";
	}
}

function ativar(tab)
{
	if (tab == "tab1")
	{
		exibe("tab1",true); 
		exibe("tab2",false);
		exibe("tab3",false);
		exibe("tab4",false);
	}

	if (tab == "tab2")
	{
		exibe("tab1",false); 
		exibe("tab2",true);
		exibe("tab3",false);
		exibe("tab4",false);
	}

	if (tab == "tab3")
	{
		exibe("tab1",false); 
		exibe("tab2",false);
		exibe("tab3",true);
		exibe("tab4",false);
	}

	if (tab == "tab4")
	{
		exibe("tab1",false); 
		exibe("tab2",false);
		exibe("tab3",false);
		exibe("tab4",true);
	}
}

/*
function ajaxLoading(action,module)
{
	if (module != "myip" && module != "pagerank")
	{
		if (action == 'show')
		{
			Element.show('loading'); 
		}
		else
		{
			Element.hide('loading');
		}
	}
}


function clearContent(div_id)
{
	document.getElementById(div_id).innerHTML = '';
}
*/

function numbersonly(myfield, e, dec) {
  var key;
  var keychar;

  if (window.event)
    key = window.event.keyCode;
  else if (e)
    key = e.which;
  else
    return true;
  keychar = String.fromCharCode(key);

  // control keys
  if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) )
    return true;

  // numbers
  else if ((("0123456789").indexOf(keychar) > -1))
    return true;

  // decimal point jump
  else if (dec && (keychar == ".")) {
    myfield.form.elements[dec].focus();
    return false;
  } else
    return false;
}

function IsNumeric(sText)
{
	var ValidChars = "0123456789";
	var IsNumber=true;
	var Char;
	
	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		{
			IsNumber = false;
		}
	}
	return IsNumber;
}

function addFav(url){
	if(url=="Add to favorites")
	{
		var url      = "http://www.gwebtools.com";
		var title    = "Network Tools and Webmaster Tools - gWebTools.com";
	}
	else
	{
		var url      = "http://www.gwebtools.com.br";
		var title    = "Ferramentas para Rede e Ferramentas para Webmasters - gWebTools.com.br";
	}

	
	
	if (window.sidebar) window.sidebar.addPanel(title, url,"");
		else if(window.opera && window.print){
			var mbm = document.createElement('a');
			mbm.setAttribute('rel','sidebar');
			mbm.setAttribute('href',url);
			mbm.setAttribute('title',title);
			mbm.click();
		}
	else if(document.all){window.external.AddFavorite(url, title);}
}