?var mychar=document.getElementById("txt");//定義"改變顏色"的函數function changecolor(){??? mychar.style.color="#8e8e8e";??? mychar.style.backgroundColor="blue";}//定義"改變寬高"的函數function changehw(){??? mychar.style.width="500px";??? mychar.style.height="500px";}//定義"隱藏內容"的函數function hidetext(){??? mychar.style.display="none";}//定義"顯示內容"的函數function showtext(){??? mychar.style.display="block";}//定義"取消設置"的函數function removeset(){??? var res=confirm("確定取消設置？");??? if(res==ture)??? {??????? mychar.removeAttribute("style");?? ??? }}? </script></body></html>