java script not working

[Oliver]

I created a form on my own and the script below works fine.  When I tried to use it with the form generated with the SourceForge generator it will not sum the form entries.  I think the problem is related to the form name or field names.  I have tried every combination I can think of but nothing works.  Any help would be greatly appreciated.

<div id="mainForm">
<div id="formHeader">
<h2 class="formInfo">Report Entry Form</h2>
<p class="formInfo">Towing Report Entry Form</p>
</div>
<BR/>
<!- begin form ->

<form method=post enctype=multipart/form-data action=processor.php onSubmit="return validatePage1();"><ul class=mainForm id="mainForm_1"><input type=hidden  name=field_1 id=field_1 value="">

<script type="text/javascript">
function startCalc()
{
interval = setInterval("calc()",1);
}
function calc()
{
one = document.mainForm.field_24.value;
two = document.mainForm.field_25.value;
three = document.mainForm.field_26.value;
four = document.mainForm.field_27.value;
five = document.mainForm.field_28.value;
six = document.mainForm.field_29.value;
document.mainForm.field_30= (one * 1) + (two * 1) + (three * 1) + (four * 1) + (five * 1) + (six * 1);
}
function stopCalc()
{
clearInterval(interval);
}

</script>

<li class="mainForm" id="fieldBox_24">
<label class="formFieldQuestion">Towing Charge&nbsp;*&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the amount of the towing charge</span></a></label><input class=mainForm type=text name=field_24 id=field_24 size='20' value=''></li>

<li class="mainForm" id="fieldBox_25">
<label class="formFieldQuestion">Winching Charge&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the charge for winching</span></a></label><input class=mainForm type=text name=field_25 id=field_25 size='20' value=''></li>

<li class="mainForm" id="fieldBox_26">
<label class="formFieldQuestion">Labor Charge&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the amount of any labor charges</span></a></label><input class=mainForm type=text name=field_26 id=field_26 size='20' value=''></li>

<li class="mainForm" id="fieldBox_27">
<label class="formFieldQuestion">Storage Charge&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the total amount of the storage charge</span></a></label><input class=mainForm type=text name=field_27 id=field_27 size='20' value=''></li>

<li class="mainForm" id="fieldBox_28">
<label class="formFieldQuestion">2ND Towing Charge&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the charge for the 2nd tow</span></a></label><input class=mainForm type=text name=field_28 id=field_28 size='20' value=''></li>

<li class="mainForm" id="fieldBox_29">
<label class="formFieldQuestion">Other Charges&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the amount of any additional charges</span></a></label><input class=mainForm type=text name=field_29 id=field_29 size='20' value=''></li>

<li class="mainForm" id="fieldBox_30">
<label class="formFieldQuestion">Total Charges&nbsp;*&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter total amount to be billed</span></a></label><input class=mainForm type=text name=field_30 id=field_30 size='20' value=''></li>

<!- end of this page ->

[gary odom]

Received your email on my personal email account? I believe you may have confused me with someone who knows what they are doing.  I can handle db and queries somewhat HTML with the aid of W3C, php with the books at my elbow and JS not at all.  Sorry I can't help, I truly wish I was informed enough that I could.

Gcodom

[Oliver]

After looking and looking I found that I missed onFocus="startCalc();" onBlur="stopCalc();" in the <input> statement.  I added it to all of the blocks i.e. 
<li class="mainForm" id="fieldBox_24">
<label class="formFieldQuestion">Towing Charge&nbsp;*&nbsp;<a class=info href=#><img src=imgs/tip_small.png border=0><span class=infobox>Enter the amount of the towing charge</span></a></label><input class=mainForm type=text name=field_24 id=field_24 size='20' value='' onFocus="startCalc();" onBlur="stopCalc();"></li> 

It still don't work.

Maybe I should just ask if there is a way to sum the blocks 24 thru 29 and put the results into block 30 ????????