function toTop() {

var nWdt = screen.width; 
var nHgh = screen.height; 

var ancho2 = screen.availWidth;
var alto2 = screen.availHeight;

if ((nWdt == 1024) && (nHgh == 768)){ 
   self.scrollTo(150, 0);
}else{
	self.scrollTo(45, 0);	
}
}

function max(){ 
  x = window.screen.availWidth; 
  y = window.screen.availHeight; 
  window.resizeTo(x,y); 
  window.moveTo(0,0); 
}