表格点击行高亮显示

<script>
onload=function(){
var tbl = document.getElementById("tbl");
for(var i = 0; i < tbl.rows.length; i++){
tbl.rows[i].onclick =function(){
if(window.cur) window.cur.style.background = "";
this.style.background = "#CCC";
window.cur = this;
}
}
}
</script>

<table id="tbl" cellspacing="0" border="1">
<tr><td>xx</td><td>xx</td></tr>
<tr><td>xx</td><td>xx</td></tr>
<tr><td>xx</td><td>xx</td></tr>
<tr><td>xx</td><td>xx</td></tr>
</table>