var clickmessage="Tasto destro disabilitato con le immagini!"

function disableclick(e) {
	if (document.all) {
		if (event.button==2||event.button==3) {
			if (event.srcElement.tagName=="IMG"){
				alert(clickmessage);
				return false;
			}
		}
	}
	else if (document.layers) {
		if (e.which == 3) {
			alert(clickmessage);
			return false;
		}
	}
	else if (document.getElementById)
		if (e.which==3&&e.target.tagName=="IMG")
		setTimeout("alert(clickmessage)",0)
}
function associateimages(){
	for(i=0;i<document.images.length;i++)
	document.images[i].onmousedown=disableclick;
}
if (document.all){
	document.onmousedown=disableclick
	for (var i_tem = 0; i_tem < document.images.length; i_tem++)
		document.images[i_tem].galleryimg='no'
}
else if (document.getElementById)
	document.onmouseup=disableclick
else if (document.layers)
	associateimages()