禁止在图片上使用右键

<title>禁止在图片上使用右键</title> <script language="JavaScript1.2"> var clickmessage="无法完成操作!" function disableclick(e) { if (document.all) { if (event.button==2||event.button==3) { if (event.srcElement.tagName=="IMG"){ alert(clickmessage); return false; } } } if (document.layers) { if (e.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() </script> <img onerror="javascript:this.src='/skin1/img/error.jpg';" src="https://img.qb5200.com/download-x/20200512/29262.gif">
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]