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// ==UserScript== // @name _Replace evil Javascript // @include http://output.jsbin.com/tezoni* // @include http://hdfree.se/embed/drama/* // @include http://fastdrama.co/watch-online/* // @run-at document-start // @grant none // ==/UserScript== /****** New "init" function that we will use instead of the old, bad "init" function. */ function init () { var newParagraph = document.createElement ('p'); newParagraph.textContent = "I was added by the new, good init() function!"; document.body.appendChild (newParagraph); } /*--- Check for bad scripts to intercept and specify any actions to take. */ checkForBadJavascripts ( [ [false, /old, evil init()/, function () {addJS_Node (init);} ], [false, /debugger/, null ], [true, /evilExternalJS/i, null ] ] ); function checkForBadJavascripts (controlArray) { /*--- Note that this is a self-initializing function. The controlArray parameter is only active for the FIRST call. After that, it is an event listener. The control array row is defines like so: [bSearchSrcAttr, identifyingRegex, callbackFunction] Where: bSearchSrcAttr True to search the SRC attribute of a script tag false to search the TEXT content of a script tag. identifyingRegex A valid regular expression that should be unique to that particular script tag. callbackFunction An optional function to execute when the script is found. Use null if not needed. */ if ( ! controlArray.length) return null; checkForBadJavascripts = function (zEvent) { for (var J = controlArray.length - 1; J >= 0; --J) { var bSearchSrcAttr = controlArray[J][0]; var identifyingRegex = controlArray[J][1]; if (bSearchSrcAttr) { if (identifyingRegex.test (zEvent.target.src) ) { stopBadJavascript (J); return false; } } else { if (identifyingRegex.test (zEvent.target.textContent) ) { stopBadJavascript (J); return false; } } } function stopBadJavascript (controlIndex) { zEvent.stopPropagation (); zEvent.preventDefault (); var callbackFunction = controlArray[J][2]; if (typeof callbackFunction == "function") callbackFunction (); //--- Remove the node just to clear clutter from Firebug inspection. zEvent.target.parentNode.removeChild (zEvent.target); //--- Script is intercepted, remove it from the list. controlArray.splice (J, 1); if ( ! controlArray.length) { //--- All done, remove the listener. window.removeEventListener ( 'beforescriptexecute', checkForBadJavascripts, true ); } } } /*--- Use the "beforescriptexecute" event to monitor scipts as they are loaded. See https://developer.mozilla.org/en/DOM/element.onbeforescriptexecute Note that it does not work on acripts that are dynamically created. */ window.addEventListener ('beforescriptexecute', checkForBadJavascripts, true); return checkForBadJavascripts; } function addJS_Node (text, s_URL, funcToRun) { var D = document; var scriptNode = D.createElement ('script'); scriptNode.type = "text/javascript"; if (text) scriptNode.textContent = text; if (s_URL) scriptNode.src = s_URL; if (funcToRun) scriptNode.textContent = '(' + funcToRun.toString() + ')()'; var targ = D.getElementsByTagName ('head')[0] || D.body || D.documentElement; //--- Don't error check here. if DOM not available, should throw error. targ.appendChild (scriptNode); }