教えてgooの答えを見てから http://okwave.jp/qa/q5862843.html <p id="Target"><span><span><span><span><span><span>Hello, World!</span></span></span></span></span></span></p> <script type="text/javascript"> (function(){ function Hello(HTMLElement){ var firstChild = HTMLElement.firstChild; var result; switch(firstC…