隐藏表格的一行

Question

<script language="javascript">
function check1(){
if (tr1.style.display == ""){
tr1.style.display = "none";
}else{
tr1.style.display = "";
}
}
</script>
<input type="button" name="b1" onclick="check1()">
<table>
<tr id="tr1"><td>......</td><tr>
</table>

Answer 1

<table><tr><td id=mytd>aaaaaaaaaaaaaaa</td></tr></table>
<input type=button value="隐藏" onclick="showhide()">
<script>
function showhide()
{
if(mytd.style.display=="none")
mytd.style.display="";
else
mytd.style.display="none";
}
</script>

Answer 2

<script>
function disptr(){
if(a1.style.display == "none"){
a1.style.display = "";
}else{
a1.style.display = "none";
}
}
</script>
<table border="1">
<tr><td>3345</td></tr>
<tr id=a1><td>asdfasdf</td>
</tr>
<tr><td>345345</td></tr>
</table>
<input type="button" onclick="disptr();" value="sdfsdf">