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  • JavaScript禁用鼠标右击

     (function(){
            var doc=document,
              ua = navigator.userAgent.toLowerCase(),
              check = function(r){return r.test(ua);},
              isOpera = check(/opera/),
              isChrome = check(/chrome/),
              isWebKit = check(/webkit/),
              isSafari = !isChrome && check(/safari/),
              isSafari2 = isSafari && check(/applewebkit\/4/),
              isSafari3 = isSafari && check(/version\/3/),
              isSafari4 = isSafari && check(/version\/4/),
              isIE = !isOpera && check(/msie/),
              isIE7 = isIE && check(/msie 7/),
              isIE8 = isIE && check(/msie 8/),
              isIE9 = isIE && check(/msie 9/),
              isIE10 = isIE && check(/msie 10/),
              isIE11 = isIE && check(/msie 11/),
              isIE6 = isIE && !isIE7 && !isIE8 && !isIE9 && !isIE10 && !isIE11,
              isGecko = !isWebKit && check(/gecko/),
              isGecko2 = isGecko && check(/rv:1\.8/),
              isGecko3 = isGecko && check(/rv:1\.9/);
            function preventKey(e) {
              var ev = e || window.event,//获取event对象
                obj = ev.target || ev.srcElement,//获取事件源
                t = obj.type || obj.getAttribute('type'),readonly = obj.readOnly||obj.getAttribute('readonly'), code = ev.keyCode||ev.which||ev.charCode,charcode = String.fromCharCode(code).toLowerCase();//获取事件源控件类型,控件只读属性,键盘值
              if ( (code == 8 && t != "password" && t != "text" && t != "textarea")||(readonly&&(t == "password" || t == "text" || t == "textarea"))) {//除不只读输入框外禁止后退键
                return false;
              }
              if (((isOpera || isGecko)?ev.which==0:true)&&(code == 116 || code == 122|| code == 123 || (ev.shiftKey && code == 121))||(((isOpera || isGecko)?ev.which!=0:true)&&ev.ctrlKey && (charcode == 'a' || charcode == 's'))) {//屏蔽 F5,F11,F12,shift+F10,ctrl+a,ctrl+s
                if (isIE)
                  ev.keyCode = 0;
                ev.returnValue = false;
                return false;
              }
            };
            if (isOpera || isGecko)
              doc.onkeypress = preventKey;
            else if (isIE || isChrome || isSafari)
              doc.onkeydown = preventKey;
            if(isIE)document.onselectstart=function(){return false;};
            doc.oncontextmenu = function(){
              if(window.event){
                window.event.cancelBubble = true;
                window.event.returnValue=false;
              }
              return false;
            };
            try{window.history.forward(1);}catch(e){}
          })();
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  • 原文地址:https://www.cnblogs.com/bingquan1/p/15744209.html
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