JavaScript help using FireFox

[DeeOr]

This JS works great in IE but does not work in FF. Can someone please advise me on what needs to be changed.

<script type="text/javascript"> 
var promptValue; 
var fW = (typeof getFormWarpRequest == "function" ? getFormWarpRequest() : document.forms["formWarpRequest"]); 
 
if ( !fW || fW == undefined) { fW = ( formWarpRequest_THIS_ ? formWarpRequest_THIS_ : formWarpRequest_NS_ );} 
var prompt = fW._oLstChoicesMth; 
if (prompt.value.length==0) 
{ 
 
/* for (i = 0; i < prompt.options.length; i++) 
{ 
 
alert(promptValue + ' ' + prompt.options[2].text) 
if (prompt.options[2].text == promptValue) 
{ 
prompt.options[2].selected = true; 
} 
}*/ 
 
prompt.options[2].selected = true; 
 
promptAction('finish'); 
} 
 
</script>

[Dormilich]

is there anything in the Error Console?

[DeeOr]

No there is no error. I think I'm missing an id tag but not sure.