Fetch two mysql resource in while loop

[sam <spun1@xxxxxxxxxxxxx>]

Hi all:
 i worte a piece of code like this
     $result1 = mysql_query(query1);
      $result2 = mysql_query(query2);
      while($row1=mysql_fetch_row($result1) && 
$row2=mysql_fetch_row($result2)){
............}
only $row2 is initazlied. row1 is always empty.
if i change it like this
while($row1=mysql_fetch_row($result1)){
$row2=mysql_fetch_row($result2)
.......}
there will be no problem and both $row1 and $row2 contain values.
can anyone tell me why? is it i worte something wrong?
                                                            sam

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