php select,radio和checkbox默认选择的实现方法

<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>
<option <?php if($myrow[wuyeleixing]==3) echo("selected");?> value="3">营业房</option>
<option <?php if($myrow[wuyeleixing]==4) echo("selected");?> value="4">厂房</option>
<option <?php if($myrow[wuyeleixing]==5) echo("selected");?> value="5">仓库</option>
<option <?php if($myrow[wuyeleixing]==6) echo("selected");?> value="6">地块</option>
<option <?php if($myrow[wuyeleixing]==7) echo("selected");?> value="7">综合楼</option>
<option <?php if($myrow[wuyeleixing]==8) echo("selected");?> value="8">农牧场</option>

<option <?php if($myrow[wuyeleixing]==9) echo("selected");?> value="9">商住楼</option>
<option <?php if($myrow[wuyeleixing]==10) echo("selected");?> value="10">宾馆酒楼</option>
<option <?php if($myrow[wuyeleixing]==11) echo("selected");?> value="11">校舍</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 type="radio" name="dishu" value="2" <?php if($myrow[dishu]==2) echo("checked");?>>划拨
<input type="radio" name="dishu" value="4" <?php if($myrow[dishu]==4) echo("checked");?>>集体

<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>
<td width="96" height="1"><strong><font color="#008080" face="楷体_gb2312"><input
name="fujia_woju" type="checkbox" value="woju" <?php if($myrow[fujia_woju]) echo("checked");?>></font></strong>卧　具</td>
<td width="99" height="1"><strong><font color="#008080" face="楷体_gb2312"><input
name="fujia_tv" type="checkbox" value="tv" <?php if($myrow[fujia_tv]) echo("checked");?>></font></strong>电视机

<form name="form" method="post" action="" enctype="multipart/form-data">
<select name='aaa' id='bbb'>
<option value=''>现有分类</option><option value='内蒙古'>内蒙古</option>
<option value='*'>*</option><option value='云南'>云南</option>
<option value='*'>*</option><option value='甘肃'>甘肃</option>
<option value='宁夏'>宁夏</option><option value='青海'>青海</option>
<option value='四川'>四川</option><option value='广西'>广西</option>
<option value='贵州'>贵州</option><option value='海南'>海南</option>
<option value='广东'>广东</option><option value='湖南'>湖南</option>
<option value='湖北'>湖北</option><option value='福建'>福建</option>
<option value='江西'>江西</option><option value='浙江'>浙江</option>
<option value='安徽'>安徽</option><option value='江苏'>江苏</option>
<option value='河南'>河南</option><option value='陕西'>陕西</option>
<option value='山东'>山东</option><option value='河北'>河北</option>
<option value='山西'>山西</option><option value='黑龙江'>黑龙江</option>
<option value='吉林'>吉林</option><option value='辽宁'>辽宁</option>
</select>
</form>
<script type="text/java script">
<!--
document.form.bbb.value = "云南";//form是表单名，atc_province是select标签id，
云南是select默认选中项
//-->
</script>