<script type="text/javascript">  var oBox = document.getElementById('box');  var oDiv = document.getElementById('div1');  var aInput = document.getElementsByTagName('input');  var aAttr = ['width', 'height', 'backgroundColor', 'display', 'display'];  var aValue = ['200px', '200px', 'red', 'none', 'block'];  for(var len=aInput.length,i=0;i<len;i++){    aInput[i].index = i; //索引    aInput[i].onclick = function(){      //重置按鈕,cssText清空DIV屬性      if(this.index == aInput.length - 1)oDiv.style.cssText = "";      //設置DIV屬性      property(oDiv, aAttr[this.index], aValue[this.index]);    };  }  //控制DIV屬性  function property(obj, attr, value){    obj.style[attr] = value;  }</script>