CRM 2011 - JScript Math Calculation (Weighted Probability)

On CRM 2011 I have an Opportunites form (standard)

I have created 4 new fields
1) Estimate High (new_estimatehigh)
2) Estimate Low (new_estimatelow)
3) Probability (%) (new_probability)
4) Weighted Probability (new_weightedprob)

I Basically need the following calculation to be done =Probability%*(Est.High+Est.Low)/2

I then need the answer to appear in Weighted Percentage

I would like this done in JScript as the workflows are pretty useless unless anyone can suggest otherwise?
Wizard_ITMDAsked:
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stacko111Commented:
I've just realised what the problem is - the fields are showing an error because other fields don't have a value in, therefore the calculation is invalid.

I don't know in what order the fields will be populated but this will always be an issue if one or more of the fields don't have a value.

I would remove the code from the OnChange Events and put it into the OnSave event of the form (keep it in the onLoad as well). The only problem with this is the users won't see the change when they make amendments to the fields, the calculation will be done every time the form is loaded and saved.

Unless they will always fill in one field last in the sequence i.e. Weighted Probability, I don't see a way around this. If they do then also keep the code in the OnChange event of the field they will populate last.
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stacko111Commented:
Try putting this code in the OnChange event of fields 1-3 and also on the OnLoad event of the form:

crmForm.all.new_weightedprob.DataValue = crmForm.all.new_probability.DataValue * (crmForm.all.new_estimatehigh.DataValue + crmForm.all.new_estimatelow.DataValue)/2;
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Wizard_ITMDAuthor Commented:
I get the following error:

Field: Window

Event: onload

Error:Object Expected
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stacko111Commented:
Are all those field names correct? Also are they all int fields or are some picklists or something else?
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Wizard_ITMDAuthor Commented:
new_estimatelow/new_estimatehigh - Currency Precision
weightedprob - Decimal Number
closeprobability - Whole Number

I have double checked all of the names (probability is closeprobability which I renamed in the line of code)

The System Field (closeprobability) is the only field that when you make a change it doesn't throw an error. All the other fields just show an error (Error: Object Expected)

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Chinmay PatelEnterprise ArchitectCommented:
Hi Wizard_IT,

On the similar lines as stacko111 has suggested, you can keep the logic on change but if the return value is NaN in JS than you can either avoid updating the field or display invalid result or something similar in the textbox and do not allow the user to save the record until they fix the error.

Regards,
Chinmay.
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