function headjs($insert_head){

    $pattern = "#src=\"(.*)\"#Ui" ; //khkzh

    preg_match_all($pattern, $insert_head, $split_content);
    foreach($split_content[1] as $libjs)
        $tabjs[]= '"'. $libjs . '"';
   
    $insert_head = implode(', ',$tabjs);
    
    return $insert_head;
}