accedere agli elementi array di un form

[cavicchiandrea]

Prova cosi:

<script>.... 
  function checkAll() {
var Box = document.getElementsByTagName("input");
    for (i = 0; i < Box.length; i++){
    if(Box[i].getAttribute("type")=="checkbox"){
Box[i].checked = true ;}
} 
}
</script>


<form name="adminGallery">
 <input type="checkbox" name="del[]"  /> Select 

 <input type="checkbox" name="del[]"  /> Select 

 <input type="checkbox" name="del[]"  /> Select 

 <input type="checkbox" name="del[]"  /> Select 

 
</form>

<button onclick="checkAll()">Select All</button>