function openWin()
{
	var url, width=500, height=200, menu=""; args = arguments;
	url = args[0];
	if (args.length>1)
	{
		width=args[1];
	}
	if (args.length>2)
	{
		height=args[2];
	}
	if (args.length>3)
	{
		if (args[3])
		{
			menu=",menubar=yes,toolbar=yes";
		}
	}

	var newwin = window.open(url, 'newWin', 'width='+width+',height='+height+',scrollbars,resizable' + menu);
}

function printPage() {
if (window.print)
    window.print()
	else
	alert( "Sorry, your browser doesn't support this feature. Please use the Print menu option of this browser to print the page. " );
}


function tamano(num) {
  tam=16;
  tam+= (num=='mas') ? .1 : -.1;
  obj=document.getElementsByTagName('*');
  for(i=0;el=obj[i];i++)
    el.style.fontSize=tam+'px';
}