select,radio和checkbox实现默认选择的方法

<select name="wuyeleixing" size="1">
<option <?php if($myrow[wuyeleixing]==1) echo "selected";?> value="1">住宅</option>
<option <?php if($myrow[wuyeleixing]==2) echo "selected";?> value="2">办公室</option>
</select>

<input type="radio" name="dishu" value="3" <?php if($myrow[dishu]==3) echo "checked";?>>空白
<input type="radio" name="dishu" value="1" <?php if($myrow[dishu]==1) echo "checked";?>>出让

<input name="fujia_jiaju" type="checkbox" value="jiaju" <?php if($myrow[fujia_jiaju]) echo "checked";?>></font></strong>家　具</td>
<td width="108" height="1"><strong><font color="#008080" face="楷体_GB2312"><input
name="fujia_chuju" type="checkbox" value="chuju" <?php if($myrow[fujia_chuju]) echo "checked";?>></font></strong>厨　具</td>