<input type=button value=view onclick="document.all.ttt.style.display=''"><br>
<select name=ttt size=1 style="display: none">
<option>a</option>
<option>a</option>
<option>a</option>
<option>a</option>
</select>
<select name=ttt size=1 style="display: none">
<option>a</option>
<option>a</option>
<option>a</option>
<option>a</option>
</select>
function display(){
if(slt.style.visibility=="visible") slt.style.visibility="hidden"
else
slt.style.visibility="visible"
}
</script>
<input type=button value="显示列表框" onclick="display()">
<select id=slt name=slt style="visibility:visible">
<option>first
<option>second
</select>
好用的话给我点分呀,多谢啦
onclick="ttt.style.display=(ttt.style.display=='none')?'':'none'">
<br><select name=ttt size=1 style="display: none">
<option>a</option>
<option>b</option>
<option>c</option>
<option>d</option>
</select>