Update field depending on content of other fields

[NikkiC]

Hi there,

I have records called Cards, which span 5 different stages.  If the first part of the Card is completed, the user is in stage 1.  If the first and second part is completed, they are in stage 2 etc etc.  I'd like to automate this (currently they can choose their own stage via a dropdown), and have written the following script, but it's not working.

<script>
var count_Brief= ("[@field:Brief]").length;
var count_AnalystNotes = ("[@field:Analyst_Notes]").length;
var count_RecTest = ("[@field:Recommended_test]").length;
var count_Result= ("[@field:Actual_result]").length;

if (count_Brief > 1) {
document.getElementById("EditRecordStage").innerHTML = "2. Brief";
} 
else if (count_Brief > 1 && count_AnalystNotes > 1) {
document.getElementById("EditRecordStage").value = "3. Analysis";
}
else if (count_Brief > 1 && count_AnalystNotes > 1 && count_RecTest > 1) {
document.getElementById("EditRecordStage").value = "4. Test";
}
else if (count_Brief > 1 && count_AnalystNotes > 1 && count_RecTest > 1 && count_Result > 1) {
document.getElementById("EditRecordStage").value = "5. Result";
}
else {
document.getElementById("EditRecordStage").value = "1. Question";
}

</script>

Does anyone have any insight here?

Many thanks

Nikki