1.控制DIV属性实例 （一）
<!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" /><title>控制div属性</title><style>#outer{width:500px;margin:0 auto;padding:0;text-align:center;}#div1{width:100px;height:100px;background:black;margin:10px auto;display:block;}</style><script>var changeStyle = function (elem, attr, value){elem.style[attr] = value};window.onload = function (){var oBtn = document.getElementsByTagName("input");var oDiv = document.getElementById("div1");var oAtt = ["width","height","background","display","display"];var oVal = ["200px","200px","red","none","block"];for (var i = 0; i < oBtn.length; i++){oBtn[i].index = i; oBtn[i].onclick = function (){this.index == oBtn.length - 1 && (oDiv.removeAttribute("style"));changeStyle(oDiv, oAtt[this.index], oVal[this.index])}}};</script></head><body><div id="outer"><input type="button" value="变宽" /><input type="button" value="变高" /><input type="button" value="变色" /><input type="button" value="隐藏" /><input type="button" value="重置" /><div id="div1"></div></div></body></html>?js 实例学习第一部分（1）