function disablerc(e) {
	var ms="Image right click disabled";
	if (document.all) {
		if (event.button==2||event.button==3) {
		if (event.srcElement.tagName=="IMG"){
		alert(ms);
		return false;
		}
		}
	} else if (document.getElementById){
		if (e.which==3&&e.target.tagName=="IMG"){
		alert(ms); return false;
		}
	} else if (document.layers) {
		if (e.which == 3) {
		alert(ms); return false;
		}
	}
}

	if (document.all) {
		document.onmousedown=disablerc;
	} else if (document.getElementById) {
		document.onmouseup=disablerc;
	} else if (document.layers) {
		for(i=0;i<document.images.length;i++)
			document.images[i].onmousedown=disablerc;
	}