<input type=button value="go" onclick="sel.style.visibility='visible';">
<select id="sel" style="visibility:hidden" onchange="this.style.visibility='hidden';">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select id="sel" style="visibility:hidden" onchange="this.style.visibility='hidden';">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
解决方案 »
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