var clickmessage="hoops !!"
		function disableclick(ev){
			if (document.all){
				if (event.button==2 || event.button==3){
					if (event.srcElement.tagName=="IMG"){
						alert(clickmessage);
						return false;
					}
				}
			}
			if (document.layers){
				if (ev.which==3){
					alert(clickmessage);
					return false;
				}
			}
		}
		function associateimages(){
			for (i=0;i<document.images.length;i++)
			document.images[i].onmousedown=disableclick
		}	
		if (document.all)document.onmousedown=disableclick
		else if (document.layers)associateimages()