function init(lay){

if (self.innerWidth)
	{
		frameWidth = self.innerWidth;
		frameHeight = self.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientWidth)
	{
		frameWidth = document.documentElement.clientWidth;
		frameHeight = document.documentElement.clientHeight;
	}
	else if (document.body)
	{
		frameWidth = document.body.clientWidth;
		frameHeight = document.body.clientHeight;
	}
var centro = (frameWidth - 800)/2
centro = parseInt(centro)
document.getElementById(lay).style.left = centro + "px";
document.getElementById(lay).style.visibility = "visible";
}