?<input type="button" value="改變顏色" onclick="changecolor()"> ?? ? <input type="button" value="改變寬高" onclick="changeshape()">? ? <input type="button" value="隱藏內(nèi)容" onclick="hide()">? ? <input type="button" value="顯示內(nèi)容" onclick="block()" >? ? <input type="button" value="取消設(shè)置" onclick="rec()" >? </form>? <script type="text/javascript">//定義"改變顏色"的函數(shù)function changecolor(){var chc=document.getElementById("con");?? ?chc.style.color="red";? ?var chc1=document.getElementById("txt");? ?chc1.style.backgroundColor="blue";}//定義"改變寬高"的函數(shù)function changeshape(){var chc=document.getElementById("txt");? chc.style.width:30px;? chc.style.height:20px;}//定義"隱藏內(nèi)容"的函數(shù)? function hide()? {var mychar = document.getElementById("txt");? ? ? mychar.style.display="none";}//定義"顯示內(nèi)容"的函數(shù)function block(){ var mychar = document.getElementById("txt");? ? ? mychar.style.display="block";}//定義"取消設(shè)置"的函數(shù)function rec(){var a=confirm("是否取消！")；? ?if(a)? ? var mychar=document.getElementById("txt");? ? mychar.removeAttribute("style");}