function centra()
{
	margine=parseInt((document.body.clientWidth-900)*0.5);
	fiate = margine + 186;
	tuve= margine + 55;
	document.getElementById("frame1").style.left=margine + "px";
	document.getElementById("fiat").style.left=fiate + "px";
	document.getElementById("tuv").style.left=tuve + "px";
	//document.getElementById("fiat").style.border="1px solid green";
	document.getElementById("testo2").style.left="589px";
	document.getElementById("contatore").style.left="589px";
	//alert(document.getElementById("testo2").style.left)
}