var clickmessage="Image sous copyright"
		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()