JS代码

function changeappid(){

var appid=document.getElementById("appid").value;

$result = TSMLDB::getInstance()->select_sql("select f.appid,t.ftypeid,t.typename from wfappform f join wfformtype t on f.ftypeid=t.ftypeid");

$apptype = array();

while ($row = mysqli_fetch_array($result)):

$apptype[] =$row ;

endwhile;

mysqli_free_result($result);

$appcount=count($apptype);

?>

document.appform.formtypeid.length = 0;

var jsappcount=0;

jsapptype = new Array();

jsappcount=<?php echo $appcount;?>;

for($j=0;$j

{

?>

jsapptype[<?echo $j;?>] = new Array("<?php echo $apptype[$j]['appid'];?>","<?php echo $apptype[$j]['ftypeid'];?>","<?php echo $apptype[$j]['typename'];?>");

}

?>

document.appform.formtypeid.options[0] = new Option('Auto Select Type','');

var j;

for (j=0;j < jsappcount; j++)

{

if (jsapptype[j][0] == appid)

{

document.appform.formtypeid.options[document.appform.formtypeid.length] = new Option(jsapptype[j][2],jsapptype[j][1]);

}

}

}

php代码

form method="post" name="appform" action="<?php echo $_SERVER["PHP_SELF"]?>">

App	<?php echo ''; echo 'Select App'; $result = TSMLDB::getInstance()->select_wfapp(); while ($row = mysqli_fetch_array($result)): echo "" . $row["rmk"] . ""; endwhile; mysqli_free_result($result); echo ''; ?>
ftype	Select Type
name="appsubmit" value="StartApp" />

参考：

http://www.cnblogs.com/down/archive/2012/05/18/2507683.html

http://developer.51cto.com/art/200912/167998.htm

http://www.okajax.com/a/200812/1202R4H008.html

http://www.jb51.net/article/28904.htm