wordchanger.js

javascript:(function(){  var originalWord = prompt("Enter the word to replace:");  var newWord = prompt("Enter the new word:");  if (originalWord && newWord) {    var bodyElements = document.getElementsByTagName("*");    for (var i = 0; i < bodyElements.length; i++) {      var element = bodyElements[i];      for (var j = 0; j < element.childNodes.length; j++) {        var node = element.childNodes[j];        if (node.nodeType === Node.TEXT_NODE) {          var text = node.nodeValue;          var replacedText = text.replace(new RegExp(originalWord, "gi"), newWord);          if (replacedText !== text) {            element.replaceChild(document.createTextNode(replacedText), node);          }        }      }    }    alert("All instances of \"" + originalWord + "\" have been replaced with \"" + newWord + "\".");  } else {    alert("Please enter both the original and the new word.");  }})();