当复选框被选中时，在PHP中调用js函数

我正在通过php创建一些复选框，像这样:

$query = mysql_query("SELECT user FROM login");
while ($row = mysql_fetch_assoc($query)) {
    $readUser = $row['user'];
    if($readUser == "mod"){}
    else {
        $checkboxUserId = $readUser;
        echo "<p><input class='filled-in item' type='checkbox' id='$checkboxUserId' checked='checked' /><label for='$checkboxUserId'>Team: $checkboxUserId</label></p>";
    }

之后的一些代码，我做:

我正在通过基于我存储在数据库中的一些值的Javascript函数绘制一些多边形。

$query = mysql_query("SELECT * FROM questionAnswers");
while ($row = mysql_fetch_assoc($query)) {
    $readUser =  $row['user'];
    $someMoreVars = $row['var']; //like ten more or that
    if ($user == "mod"){
        if ($readUser == "mod"){}
        else{
             echo "drawUserPoly($someMoreVars, $iDontWantToListThemAll, $thatsJustForTheContext)";
             //Some More Code here
        }

现在的问题:我需要检查复选框，其中一个被选中，所以我不画它们，这需要实时更新(如:再次检查复选框，多边形将被绘制，取消复选框，多边形不被绘制)。

我的尝试:

else {
      if(isset($_POST['$readUser'])){
      echo "drawUserPoly($someMoreVars, $iDontWantToListThemAll, $thatsJustForTheContext)";
      }
}

my second try:

else {
      if($_POST['$readuser'] == 'checked'){
      echo "drawUserPoly($someMoreVars, $iDontWantToListThemAll, $thatsJustForTheContext)";
      }
}