/*--- waitForKeyElements(): A utility function, for Greasemonkey scripts, that detects and handles AJAXed content. Usage example: waitForKeyElements ( "div.comments" , commentCallbackFunction ); //--- Page-specific function to do what we want when the node is found. function commentCallbackFunction (jNode) { jNode.text ("This comment changed by waitForKeyElements()."); } IMPORTANT: This function requires your script to have loaded jQuery. */ function waitForKeyElements ( selectorTxt, /* Required: The jQuery selector string that specifies the desired element(s). */ actionFunction, /* Required: The code to run when elements are found. It is passed a jNode to the matched element. */ bWaitOnce, /* Optional: If false, will continue to scan for new elements even after the first match is found. */ iframeSelector /* Optional: If set, identifies the iframe to search. */ ) { var targetNodes, btargetsFound; if (typeof iframeSelector == "undefined") targetNodes = $(selectorTxt); else targetNodes = $(iframeSelector).contents () .find (selectorTxt); if (targetNodes && targetNodes.length > 0) { btargetsFound = true; /*--- Found target node(s). Go through each and act if they are new. */ targetNodes.each ( function () { var jThis = $(this); var alreadyFound = jThis.data ('alreadyFound') || false; if (!alreadyFound) { //--- Call the payload function. var cancelFound = actionFunction (jThis); if (cancelFound) btargetsFound = false; else jThis.data ('alreadyFound', true); } } ); } else { btargetsFound = false; } //--- Get the timer-control variable for this selector. var controlObj = waitForKeyElements.controlObj || {}; var controlKey = selectorTxt.replace (/[^\w]/g, "_"); var timeControl = controlObj [controlKey]; //--- Now set or clear the timer as appropriate. if (btargetsFound && bWaitOnce && timeControl) { //--- The only condition where we need to clear the timer. clearInterval (timeControl); delete controlObj [controlKey] } else { //--- Set a timer, if needed. if ( ! timeControl) { timeControl = setInterval ( function () { waitForKeyElements ( selectorTxt, actionFunction, bWaitOnce, iframeSelector ); }, 300 ); controlObj [controlKey] = timeControl; } } waitForKeyElements.controlObj = controlObj; }