判断复选框是否被选中

var checkyou=document.getElementsByName('checkyou[]');
var isSel=false;
for(var i=0;i<checkyou.length;i++)
{
if(checkyou[i].checked==true)
{
isSel=true;
break;
}
}
if(isSel==false)
{
alert("请选择产品属性！");
return false;
}

<form action="index.php?module=RProduct&action=add" method="post" οnsubmit="return check(this);" enctype="multipart/form-data">

<input name="checkyou[]" type="checkbox" value="{$shuxing->id}" />

</form>

 

  // 编辑 默认选中

$sqla = "select cid from ntb_productlx_attribute where id in(".$sid.") group by cid";
$shuxing = $db->select($sqla);
$sqla = "select * from ntb_productlx";
$result = $db->select($sqla);
foreach($result as $k=>$v){
$result[$k]->shuxing = $this->getatts($v->id, $r[0]->sid);
}

 

//方法
private function getatts($id,$ids){
$ids = explode(",", $ids);
$db = DBAction::getInstance();
$sqlb = "select * from ntb_productlx_attribute where cid = ".$id;
$res = $db->select($sqlb);
if(!empty($res)){
foreach($res as $k=>$v){
if(in_array($v->id,$ids)){
$res[$k]->selected = 1;
}
}
return $res;
}else{
return false;
}
}

 

转载于:https://www.cnblogs.com/nonoleng/p/4616437.html