Adding Numbers which are Strings???

[budapestnori]

I hope this is simple for someone reading this. I have a web page -

http://tmh.netdbs.com/myers/clients/prints1.asp

If you look at it, you will see a series of images, each image adjoining drop-downs with qty's for a particular print size for that a particular image. You will see I have it scripted so each image, has a running subtotal, to the bottom right of the dropdowns. Each time a print size qty for a given image is changed this Function is called:

function calculatePrintTotal(imgid)
{
var img4x6 = round_decimals((document.getElementById(imgid + "_4x6_cnt").value * .29),2);
var img5x7 = round_decimals((document.getElementById(imgid + "_5x7_cnt").value * .99),2);
var img8x10 = round_decimals((document.getElementById(imgid + "_8x10_cnt").value * 3.99),2);
var img16x20 = round_decimals((document.getElementById(imgid + "_16x20_cnt").value * 17.99),2);
var img20x30 = round_decimals((document.getElementById(imgid + "_20x30_cnt").value * 22.99),2);
var imgwallet = round_decimals((document.getElementById(imgid + "_wallet_cnt").value * 1.79),2);
document.getElementById("total_" + imgid).value = round_decimals((parseFloat(img4x6) + parseFloat(img5x7) + parseFloat(img8x10) + parseFloat(img16x20) + parseFloat(img20x30) + parseFloat(imgwallet)),2);
sumtotal();
}

It in turn calls two functions in its execution, one is called round_decimals and its code is here:

function round_decimals(original_number, decimals) {
var result1 = original_number * Math.pow(10, decimals)
var result2 = Math.round(result1)
var result3 = result2 / Math.pow(10, decimals)
return pad_with_zeros(result3, decimals)
}

function pad_with_zeros(rounded_value, decimal_places) {

// Convert the number to a string
var value_string = rounded_value.toString()

// Locate the decimal point
var decimal_location = value_string.indexOf(".")

// Is there a decimal point?
if (decimal_location == -1) {

// If no, then all decimal places will be padded with 0s
decimal_part_length = 0

// If decimal_places is greater than zero, tack on a decimal point
value_string += decimal_places > 0 ? "." : ""
}
else {

// If yes, then only the extra decimal places will be padded with 0s
decimal_part_length = value_string.length - decimal_location - 1
}

// Calculate the number of decimal places that need to be padded with 0s
var pad_total = decimal_places - decimal_part_length

if (pad_total > 0) {

// Pad the string with 0s
for (var counter = 1; counter <= pad_total; counter++)
value_string += "0"
}
return value_string
}

The second function is giving me difficulties. Here it is:

function sumtotal(){
var sum = 0;
for(count = 1; count < rsArray.length; count++)
sum += parseFloat(sum + document.getElementById("total_"+rsArray[count]).value);
x = round_decimals(sum,2);
alert(x);
}

The rsArray is an arrray whose elements hold IDs for each image. In this function, you can see that I am attempting to loop through the element(s) named "total_rs"+Array[count] and store the total sum of their values into a variable called "sum". It is giving me screwy results, instead of a nice tidy "sum" I can then place in round_decimals and insert in another location on the page to give a shopper their grand total.

Any help would be appreciated.

 

[budapestnori]

I solved it!