var upper = 1024;
var lower = 800;

function Proceed( sLang, upperWidth, lowerWidth, sUpperURL, sLowerURL )
{
  var proceed;

  if ( screen.width < upperWidth )
    proceed = sLowerURL;
  else
    proceed = sUpperURL;

  var sProceedURL = "./" + sLang + proceed + ".html";
  // alert( sProceedURL );
  document.location = sProceedURL;

}