除了这种方法,还有别的好方法吗?注意是追加不是添加,不能冲掉原来的格式
t_str=tab.rows[i].cells[j].className;
if (t_str!=null && t_str!="") tab.rows[i].cells[j].className =t_str + " gt-inner";
else tab.rows[i].cells[j].className ="gt-inner";
t_str=tab.rows[i].cells[j].className;
if (t_str!=null && t_str!="") tab.rows[i].cells[j].className =t_str + " gt-inner";
else tab.rows[i].cells[j].className ="gt-inner";
<div id="dd" class="a">fdasfs</div>
<script type="text/javascript">
document.getElementById("dd").className=document.getElementById("dd").className+" b";
</script>
http://www.cnblogs.com/insus/archive/2011/08/18/2144041.html
http://www.cnblogs.com/insus/archive/2011/08/18/2143996.html