var rows = document.getElementsByTagName('tr');
for( var i = 0, row; row = rows[i]; i++ ) {
row.className = 'newclass';
}
测试代码：
li { margin-left:28px;}
.abc {background-color:#eee;font-size:14px; margin-bottom:10px;}
var rows = document.getElementsByTagName('tr');
for( var i = 0, row; row = rows[i]; i++ ) {
row.className = 'newclass';
}
测试代码：
li { margin-left:28px;}
.abc {background-color:#eee;font-size:14px; margin-bottom:10px;}