//teste de informação de janela
function  testeScreen()
{
	 if (navigator.appName=="Microsoft Internet Explorer"){
		if (document.body.clientWidth>775 || document.body.clientHeight>435){
		document.all.principal.style.pixelTop=(document.body.clientHeight-480)/2
		document.all.principal.style.pixelLeft=(document.body.clientWidth-750)/2
		}
	}
	else//mozilla e opera
	{
		if (self.innerWidth>775 || self.innerHeight>435){
		document.getElementById("principal").style.top=(document.body.clientHeight-480)/2
		document.getElementById("principal").style.left=(document.body.clientWidth-750)/2
		}

	}
		//window.status = "y:"+document.body.clientHeight+", x:"+document.body.clientWidth+" e "+navigator.appName
		//window.status = "x:"+self.innerWidth;+", y:"+self.innerHeight+" e "+navigator.appName
		setTimeout("testeScreen()",1);
}