//This part is working
<?php
        $vbCrLf = chr(13).chr(10);
        error_reporting(0);
    // open connection to MySQL server
    $link = mysqli_connect("localhost", "root", "root", "print")
    or die ('Unable to connect!');


    //create and execute query
    $query = "SELECT  bin, iban, bename, benadd, bcoun, bcode, bname, badd FROM datee";
    $result = mysqli_query($link,$query);

    //create selection list
    $DropDownList .= "<select name='Company' id='DropDownListId' onchange='javascript:SelectChanged();'> ".$vbCrLf;
    $DropDownList .= "<option value=''></option> ".$vbCrLf;

    while($row = mysqli_fetch_row($result))
    {
        $heading = $row[0];
        $DropDownList .= "<option value='$heading'>$heading</option> ".$vbCrLf;


        $IbnArrayPhp .= 'IbnArray["'.$heading.'"]="'.$row[1].'";'.$vbCrLf;
        $BenameArrayPhp .= 'BenameArray["'.$heading.'"]="'.$row[2].'";'.$vbCrLf;
        $BenaddArrayPhp .= 'BenaddArray["'.$heading.'"]="'.$row[3].'";'.$vbCrLf;
        $BcounArrayPhp .= 'BcounArray["'.$heading.'"]="'.$row[4].'";'.$vbCrLf;
        $BcodeArrayPhp .= 'BcodeArray["'.$heading.'"]="'.$row[5].'";'.$vbCrLf;
        $BnameArrayPhp .= 'BnameArray["'.$heading.'"]="'.$row[6].'";'.$vbCrLf;
        $BaddArrayPhp .= 'BaddArray["'.$heading.'"]="'.$row[7].'";'.$vbCrLf;
    }
    $DropDownList .= "</select> ".$vbCrLf;
      ?>


<script language="Javascript" type="text/javascript">
    var IbnArray = new Array();
    <?php echo $IbnArrayPhp; ?>
    var BenameArray = new Array();
    <?php echo $BenameArrayPhp; ?>
    var BenaddArray = new Array();
    <?php echo $BenaddArrayPhp; ?>
    var BcounArray = new Array();
    <?php echo $BcounArrayPhp; ?>
    var BcodeArray = new Array();
    <?php echo $BcodeArrayPhp; ?>
    var BnameArray = new Array();
    <?php echo $BnameArrayPhp; ?>
    var BaddArray = new Array();
    <?php echo $BaddArrayPhp; ?>
    function SelectChanged()
    {
        var Company = document.getElementById('DropDownListId').value;
        document.getElementById('iban').value = IbnArray[Company];
        document.getElementById('bename').value = BenameArray[Company];
        document.getElementById('benadd').value = BenaddArray[Company];
        document.getElementById('bcoun').value = BcounArray[Company];
        document.getElementById('bcode').value = BcodeArray[Company];
        document.getElementById('bname').value = BnameArray[Company];
        document.getElementById('badd').value = BaddArray[Company];

    }
</script>
        <?php echo $DropDownList; ?>
</label>
</legend>

//This part is not working
<?php
        $vbCrLf1 = chr(13).chr(10);
        error_reporting(0);
    // open connection to MySQL server
    $link1 = mysqli_connect("localhost", "root", "root", "print")
    or die ('Unable to connect!');


    //create and execute query
    $query1 = "SELECT  aini, acname, acnum, num2, num3 FROM datee";
    $result1 = mysqli_query($link1,$query1);

    //create selection list
    $DropDownList1 .= "<select name='Company1' id='DropDownList1Id' onchange='javascript:SelectChanged();'> ".$vbCrLf1;
    $DropDownList1 .= "<option value=''></option> ".$vbCrLf1;

    while($row1 = mysqli_fetch_row($result1))
    {
        $heading1 = $row1[0];
        $DropDownList1 .= "<option value='$heading1'>$heading1</option> ".$vbCrLf1;


        $AcnameArrayPhp .= 'AcnameArray["'.$heading1.'"]="'.$row1[1].'";'.$vbCrLf1;
        $AcnumArrayPhp .= 'AcnumArray["'.$heading1.'"]="'.$row1[2].'";'.$vbCrLf1;
        $Num2ArrayPhp .= 'Num2Array["'.$heading1.'"]="'.$row1[3].'";'.$vbCrLf1;
        $Num3ArrayPhp .= 'Num3Array["'.$heading1.'"]="'.$row1[4].'";'.$vbCrLf1;

    }
    $DropDownList1 .= "</select> ".$vbCrLf1;
      ?>


<script language="Javascript" type="text/javascript">
    var AcnameArray = new Array();
    <?php echo $AcnameArrayPhp; ?>
    var AcnumArray = new Array();
    <?php echo $AcnumArrayPhp; ?>
    var Num2Array = new Array();
    <?php echo $Num2ArrayPhp; ?>
    var Num3Array = new Array();
    <?php echo $Num3ArrayPhp; ?>


    function SelectChanged()
    {
        var Company1 = document.getElementById('DropDownList1Id').value;
        document.getElementById('acname').value = AcnameArray[Company1];
        document.getElementById('acnum').value = AcnumArray[Company1];
        document.getElementById('num2').value = Num2Array[Company1];
        document.getElementById('num3').value = Num3Array[Company1];



    }
</script>
        <?php echo $DropDownList1; ?>
</label>
</legend>