Question

js and loops- its all greek to me

Asked by: owlsey

well, hope everyone is having a good holiday season...

i need to make a loop to multiply a value of a textarea to a predefined variable, ans take the sum of the loop and display it in  a textarea...

i can do the math part- but the loop is making me crazy...

<script language="JavaScript">
<!-- // cloak
var vals = new Array(43.5,43.5,27.5,23,7,6.5,13.5,12.5,28.5,70,21,21,9.5,9.5,12.25,19.25,6,33.5,2.2,34,8,49.5,49.5);
function recalc(orderform) {
var orderTotal = 0;
var theVal = 0;
for(var i = 0; i < vals.length; i++) {
theVal = parseInt(orderform.elements['T'+(i+1)].value)*vals[i];
orderform.elements['s'+(i+1)].value = theVal;
orderTotal += theVal;
}
orderform.totalOrder.value = "$" + orderTotal;
}

// uncloak -->
T1-T23 are the text areas for the input(quantity)

i had an earlier version that used "s" for the multiplication factor...

form name="orderfrom"

was ist nicht richtig?

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Asked On
1999-12-06 at 07:58:48ID10243107
Topic

JavaScript

Participating Experts
3
Points
200
Comments
9

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Answers

 

by: knightEknightPosted on 1999-12-06 at 08:08:28ID: 2258973

How are you calling the function?  Are you passing in the form correctly?

 

by: owlseyPosted on 1999-12-06 at 08:21:52ID: 2259037

<input TYPE="button"
      onClick="recalc(orderform)">

 

by: rmgalantePosted on 1999-12-06 at 08:23:31ID: 2259044

Try this

var orderTotal = 0;
var theVal = 0;
var theTElement;
var theSElement;
for(var i = 0; i < vals.length; i++) {
  theTElement = eval('orderform.' + 'T' + (i+1));
  theVal = parseInt(theElement.value)*vals[i];
  theSElement = eval('orderform.' + 's' + (i+1));
  theSElement.value = theVal;
  orderTotal += theVal;
}
orderform.totalOrder.value = "$" + orderTotal;
}

And you really ought to add some error checking on the input fields before processing them (isNaN, etc).

Rob

 

by: owlseyPosted on 1999-12-06 at 08:24:53ID: 2259048

<input TYPE="text" NAME="T1" onChange="recalc(this.form)" size="3">

this is where the user enters in the quantity

<input
      type="text" name="totalOrder" size="6">

this is the text area for the product(T1-23 * price etc.)..

 

by: owlseyPosted on 1999-12-06 at 08:27:55ID: 2259063

this is where i show my js education...


i put that script within the function (recalc){}

ex.
<!-- // cloak
var vals = new Array(43.5,43.5,27.5,23,7,6.5,13.5,12.5,28.5,70,21,21,9.5,9.5,12.25,19.25,6,33.5,2.2,34,8,49.5,49.5);
function recalc(orderform) {
var orderTotal = 0;
var theVal = 0;
var theTElement;
var theSElement;
for(var i = 0; i < vals.length; i++) {
  theTElement = eval('orderform.' + 'T' + (i+1));
  theVal = parseInt(theElement.value)*vals[i];
  theSElement = eval('orderform.' + 's' + (i+1));
  theSElement.value = theVal;
  orderTotal += theVal;
}
orderform.totalOrder.value = "$" + orderTotal;
}
}
orderform.totalOrder.value = "$" + orderTotal;
}

// uncloak -->

 

by: owlseyPosted on 1999-12-07 at 09:37:28ID: 2262627

why won't this dang-blasted script run w/o an error  

textareas all start "T" and then a num1-23
text area totalOrder=display of final price(s)

help!! im starting to look at the window....

<script language="JavaScript"><!-- // cloak
var vals = new Array(32.63,32.63,20.63,17.25,5.25,4.88,10.13,9.38,21.38,52.50,15.75,15.75,7.13,7.13,9.19,14.44,4.50,25.13,1.65,25.50,6.00,37.13,37.13);
function recalc(orderform) {
var orderTotal = 0;
var theVal = 0;
var theField;
for(var i = 0; i < vals.length; i++);
{
theField = orderform.elements['T'+(i+1)] ;
if (theField.elements.value);
{
theVal =parseInt(orderform.elements['T'+(i+1)].value)*vals[i];
orderTotal += theVal;
}
 }
orderform.totalOrder.value = "$" + orderTotal;
 }
// uncloak --></script>

 

by: markbashamPosted on 1999-12-08 at 02:55:31ID: 2264755

Here you go owlsey, copy and paste this...
<script language="JavaScript">
<!-- // cloak
var vals = new Array(32.63,32.63,20.63,17.25,5.25,4.88,10.13,9.38,21.38,52.50,15.75,15.75,7.13,7.13,9.19,14.44,4.50,25.13,1.65,25.50,6.00,37.13,37.13);

function recalc(orderform) {
 var orderTotal = 0;
 var theVal = 0;
 var theField;
 var j;
 for(var i = 0; i < vals.length; i++) {
  j = i + 1;
  theField = orderform.elements['T'+ j ];
  if (theField.value) {
   theVal = parseInt(theField.value) * vals[i];
   orderTotal += theVal;
  }
 }
 orderform.totalOrder.value = "$" + orderTotal;
}
// uncloak-->
</script>

 

by: owlseyPosted on 1999-12-08 at 06:16:29ID: 2265170

ROCK and/or ROLL

thanx

 

by: owlseyPosted on 1999-12-08 at 13:48:04ID: 2266667

uh, why does it go to more than 3 decimal places after the 7th field????

20120131-EE-VQP-002

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