Calculate Dynamically With Fields From PHP Query

Feb 17, 2011

I am trying to calculate text fields from results of php query. My fields come from the query as amount1, amount2.... What I need is for JS to Sum those fields dynamically, I already did code for when i have all the values and for when the text field name is the same, but never for query results where the names are different. This is what I have so far but its not working

function calculatesumexcon() {
var a, total = 0;
var countJS = "<?=$count?>"; <-- variable of php that gives me the number of rows I am getting on the query
var i ;
for ($i=0;$i<countJS;$i++){
var elements = document.getElementsById('amount' + i);
for(a=0; a<elements.length; a++){
total += (parseFloat(elements[a].value));
}}
document.getElementById("totalextracon").value = total ;
}

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I've created the code below which automatically adds two fields together (drop-down boxes),without the need for a submit or input button.Now,I am trying to do the same again, but this time instead of having drop-down boxes,i need to have text input boxes.(eventually i will be adding monetary values together).

-----------

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2. calculate total of all linetotals.

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Code:

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[code]....

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