这样子?<table>
<tr><td>奖品1</td><td>奖品2</td><td>奖品3</td><td>奖品4</td></tr>
</table>
<input type="button" onclick="choujiang()" value="抽奖"/>
<script>
function choujiang()
{
var objtb = document.getElementsByTagName("table")[0];
for(var i=0,j=objtb.rows[0].cells.length;i<j;i++)objtb.rows[0].cells[i].style.backgroundColor="";
objtb.rows[0].cells[Math.random()*4].style.backgroundColor="red";
}
</script>
<tr><td>奖品1</td><td>奖品2</td><td>奖品3</td><td>奖品4</td></tr>
</table>
<input type="button" onclick="choujiang()" value="抽奖"/>
<script>
function choujiang()
{
var objtb = document.getElementsByTagName("table")[0];
for(var i=0,j=objtb.rows[0].cells.length;i<j;i++)objtb.rows[0].cells[i].style.backgroundColor="";
objtb.rows[0].cells[Math.random()*4].style.backgroundColor="red";
}
</script>
<tr><td>奖品1</td><td>奖品2</td><td>奖品3</td><td>奖品4</td><td>奖品5</td><td>奖品6</td></tr>
</table><input type="button" onclick="choujiang()" value="抽奖"/>
<br/>
<span style="background-color:#cc2200"></span>
<script>
var s = new Array();
function choujiang()
{
var objtb = document.getElementsByTagName("table")[0];
var ihuojiang;
var i=objtb.rows[0].cells.length-1;
if(i>=0)
{
ihuojiang = Math.random()*i;
document.getElementsByTagName("span")[0].innerHTML +="已获奖:"+objtb.rows[0].cells[ihuojiang].innerText+"<br/>";
objtb.rows[0].removeChild(objtb.rows[0].cells[ihuojiang]);
}else{alert("抽完啦大哥");}
}
</script>