function HVpop(){
  var ContextWindow = window.open("http://rhaworth.me/howview.htm","HVpop","width=300,height=440,resizable=1,scrollbars=1,toolbar=0,status=1");
  ContextWindow.focus();
  return false;
}

document.write( '<a href="http://rhaworth.me/howview.htm" target="HVpop" onclick="return HVpop();">Viewing suggestion</a>.' );