how insert an array double in hidden field and use in javascript

this work (I see 10000)
code php
$fruits=10000;
echo <input type="hidden" name="x1[]" id="x1[]" value="$fruits" >;

code javascript
var test3 = document.formID.elements['x1[]'];
alert(test3[0].value);
---------------------------------------------------

now the code bottom, not work; I see in the alert popup the word: array;
I want to use the array of array in the javascript's code
using the hidden's variable

code php
foreach ($arrayquery as $a)
{
$fruits = array($a['type'] => array(1 => 'color', 2 => 'pos'));
echo <input type="hidden" name="x1[]" id="x1[]" value="$fruits" >;
}

code javascript
var test3 = document.formID.elements['x1[]'];
alert(test3[0].value);

any idea?
.

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