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"){ 
			alert(clickmessage) 
			return false 
		} 
	} 
} 

function associateimages(){ 
	for(i=0;i<document.images.length;i++) 
	document.images[i].onmousedown=disableclick; 
}