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 <SELECT MULTIPLE="multiple" NAME="polymorphismType" SIZE="5">
         <OPTION value="" selected="selected">ANY</OPTION>
...
<OPTION VALUE='1878514'>MNP</OPTION>

          </SELECT>

 <SELECT MULTIPLE="multiple" SIZE="5" NAME="functionClass">
            <OPTION value="" selected="selected">ANY</OPTION>
...
<OPTION VALUE='1878494'>Splice-Site</OPTION>

          </SELECT>

$variation='polymorphismType';
$varvalue=("1878510");
...
$moz->select($variation,$varvalue);

$moz->select($func_class,$funcvalue);