ToHEAD
<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
<!--
function Chk(){
if(document.PA.pa.value=='')location.href='';
else{alert('')}
}
//-->
</SCRIPT>
ToBODY
<FORM ACTION="#" NAME="PA">
<INPUT TYPE="password" NAME="pa">
<INPUT TYPE="button" VALUE=" OK " onClick="Chk() " onKeyPress="Chk() ">
</FORM>
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