<form name=form1 action='page1.jsp' method=post>
<select name=Queryimg class="select" onchange="this.form.action=this.value">
<option value="page1.jsp">查询A</option>
<option value="page2.jsp">查询B</option>
<option value="page3.jsp">查询C</option>
</select>
</form>
<select name=Queryimg class="select" onchange="this.form.action=this.value">
<option value="page1.jsp">查询A</option>
<option value="page2.jsp">查询B</option>
<option value="page3.jsp">查询C</option>
</select>
</form>
<option value="1">查询A</option>
<option value="2">查询B</option>
<option value="3">查询C</option>
</select>
</form>
<option value="1">查询A</option>
<option value="2">查询B</option>
<option value="3">查询C</option>
</select>
</form>