<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <meta name="auther" content="fq" /> <title>監聽輸入框值的即時變化 onpropertychange oninput</title> <script type="text/javascript"> function immediately(){ var element = document.getElementById("mytext"); if("\v"=="v") { element.onpropertychange = webChange; }else{ element.addEventListener("input",webChange,false); } function webChange(){ if(element.value){document.getElementById("test").innerHTML = element.value}; } } </script> </head> <body> 直接寫在頁面中的示例: <input type="text" name="textfield" oninput="document.getElementById('webtest').innerHTML=this.value;" onpropertychange="document.getElementById('webtest').innerHTML=this.value;" /> <div>您輸入的值爲:<span id="webtest">還未輸入</span></div> <br /><br /><br /><br /><br /> 寫在JS中的示例: <input type="text" name="textfield" id="mytext" /> <div>您輸入的值爲:<span id="test">還未輸入</span></div> <script type="text/javascript"> immediately(); </script> </body> </html>