message = "Copyright © Lindholms Kakelugnsmakeri";

browserVersion  = parseInt(navigator.appVersion)
netscape = navigator.appName=="Netscape"
iexplore = navigator.appName=="Microsoft Internet Explorer"

function disable(e) {
   if (netscape && e.which > 1){
      alert(message)
      return false
   } 
	else if (iexplore && (event.button >1)) {
		if (event.srcElement.tagName == "IMG"){
			alert(message);
			return false;
		}
   }
}

document.onmousedown = disable;
if (document.layers) window.captureEvents(Event.mousedown);
if (netscape && browserVersion<5) window.onmousedown = disable;