<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>dom操作節(jié)點(diǎn)</title><style type="text/css">body{font-size:13px;line-height:25px;}table{?border-top: 1px solid #F00;?border-left: 1px solid #F00;?width:300px;}td{?border-bottom: 1px solid #3FF;?border-right: 1px solid #3FF;}.title{?text-align:center;?font-weight:bold;?background-color:#0C6;}</style><script type="text/javascript">function one(){?var newtr = document.createElement("tr");?var newtd1 = document.createElement("td");?var text1 = document.createTextNode("圖書3");?newtd1.appendChild(text1);??var newtd2 = document.createElement("td");?var text1 = document.createTextNode("33.00");?newtd1.appendChild(text2);?newtr.appendChild(newtd1);?newtr.appendChild(newtd2);?document.getElementById("row1").parentNode.appendChild(newtr);}function two(){?var myTable = document.getElementById("myTable");?var colltr = myTable.getElementsBytagname("tr");?if(colltr.length>=2){??var deltr = myTable.getElementsBytagname("tr")[1];??deltr.parentNode.removeChild(deltr);?}}function san(){?var gai = document.getElementById("row1");?gai.className = "title";}</script></head><body><table border="0" cellspacing="0" cellpadding="0" id="myTable"><tr id = "row1"><td>書名</td><td>價(jià)格</td></tr><tr id = "row2"><td>圖書1</td><td>33.00</td></tr><tr id = "row3"><td>圖書2</td><td>33.00</td></tr></table><input name="b1" type="button" value="增加一行" onclick="one()"/><input name="b2" type="button" value="刪除第2行" onclick="two()"/><input name="b3" type="button" value="修改標(biāo)題" onclick="san()"/></body></html>打開點(diǎn)擊沒有效果，什么原因，怎么改呢，剛學(xué)dom搞不明白
書上代碼求解
慕粉1145407289
2017-05-06 16:45:10