/* Set variables */

var w_viewport,h_viewport,left_reload,top_reload;

function resize()
{

  if (self.innerHeight) // all except Explorer
  {
  	w_viewport = self.innerWidth;
  	h_viewport = self.innerHeight;
  }
  else if (document.documentElement && document.documentElement.clientHeight)
  	// Explorer 6 Strict Mode
  {
  	w_viewport = document.documentElement.clientWidth;
  	h_viewport = document.documentElement.clientHeight;
  }
  else if (document.body) // other Explorers
  {
  	w_viewport = document.body.clientWidth;
  	h_viewport = document.body.clientHeight;
  }

  /*definisce nuove dimensioni */

	if (w_viewport<=750) {
	 left_reload = '0px';
  }
   else if (w_viewport>750) {
	 left_reload = (w_viewport-750)/2 + 'px';
  }
	if (h_viewport<=610) {
	 top_reload = '0px';
  }
	else if (h_viewport>610) {
    top_reload = (h_viewport-610)/2 + 'px';
  }
  	document.getElementById("background").style.width = w_viewport + 'px';
	document.getElementById("background").style.height = h_viewport + 'px';
  	document.getElementById("frame").style.width = w_viewport + 'px';
	document.getElementById("frame").style.height = h_viewport + 'px';
	document.getElementById("main").style.top = top_reload;
	document.getElementById("main").style.left = left_reload;
}

window.onresize = resize;