var size_im,intervallo
	size_im = 0;
	function hide30()
	{
		document.getElementById("div30").style.visibility = "hidden";
	}
	function settempo()
	{
		window.setTimeout(hide30,8000)
	}
	function resize_imm()
	{
		if(size_im <=451)
		{
			document.getElementById("div30").style.width = size_im + "px";
			document.getElementById("img30").style.width = size_im + "px";
			size_im += 20;
		} 
		else
		{
			window.clearInterval(intervallo)
		}
	}
	function gest_intervallo()
	{
   		intervallo =	window.setInterval("resize_imm()",20)
   	}