JS - 传递_GET变量onclick

Question

The following snippet currently works, however having difficulties replacing the numeric value for group_type with $_GET['group_type'] which has been passed from previous page which I require to be passed onto sales.php.

<select name="group_id" onclick="javascript:document.location.href='sales.php?group_type=2&group_id='+this.value;" 

Thanks

Answer 1

Try:

<select name="group_id" onclick="javascript:document.location.href='sales.php?group_type=<?=$_GET['group_type']?>&group_id='+this.value;">