function getUrlVar( param_name )
{
  param_name = param_name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regex = new RegExp( "[\\?&]"+param_name+"=([^&#]*)" );
  var rMatch = regex.exec( window.location.href );
  if( rMatch == null )
  {
    return "";
  } else {
    return rMatch[1];
  }
}

function font_size()
{
	var font_size = getUrlVar("font_size");
	if (font_size) {
		document.write("class='"+font_size+"'");
	}
	//alert(getUrlVar("font_size"));
}