Form Validation Question

[Mighty]

Guys,

I am very new to the whole Javascript thing and am looking for some assistance. I have a "dynamic" form in that when it comes to validation I won't have a definite idea how many rows of input boxes I will have. The input fields are named in the format of Qty1, Qty2, Qty3,...DueDate1, DueDate2, DueDate3,...,etc for each row of inputs. I have the number of rows stored as a hidden field in the form. Is there some way that I can do something like:

for (i=0; i<document.myform.numrows.value; i++) {
if (document.myform.Qty(i) =&quot;&quot { // I know this is not right but this is the kind of thing I want to do
alert (&quot;Enter a quantity value in row i&quot
}
}

 

[SeAL]

Instead of naming your form element Qty1, Qty2 ... you have to use the same name like Qty afer, you make an eval like myElement = eval(&quot;document.forms[0].Qty&quot; to make an Array of those Element

example :

myElement = eval(&quot;document.Forms[0].Qty&quot;
for (var i = 0; i < myElement.length; i++) {
if (myElement.value + &quot;&quot; == &quot;&quot {
alert(&quot;Enter a quantity value in row &quot; + i);
}
};

I hope that it will help you, let me know if it fix your problem

 

[Mighty]

SeAL,

Thanks for the response but I had already got it working. I used the following:

for (i=0; i<document.myform.numrows.value; i++) {
if (eval(&quot;document.myform.Qty&quot; + i).value =&quot;&quot {
alert (&quot;Enter a quantity value in row&quot; + i)
}
}
Mise Le Meas,

Mighty

 

[SeAL]

it's exactly the same things except that with the sample i gave you, you don't care of the row numbers 'cose you use the length of the Array

But I forget something in my sample :

if (myElement.value + &quot;&quot; == &quot;&quot {
alert(&quot;Enter a quantity value in row &quot; + i);
}

and not
if (myElement.value + &quot;&quot; == &quot;&quot {
alert(&quot;Enter a quantity value in row &quot; + i);
}

Regards

 

[iza]

mighty, this : if (eval(&quot;document.myform.Qty&quot; + i).value =&quot;&quot won't work !!
read carefully SeAL examples - *they* are correct

 

[Mighty]

iza,

The code below is taken striaght fromy OPERATIONAL page. This works fine.

if ((isNaN(eval(&quot;document.ProdForm.Qty&quot; + i).value)) || (eval(&quot;document.ProdForm.Qty&quot; + i).value == &quot;&quot) {
alert(&quot;You must enter a NUMBER in the Quantity Field in row &quot; + i);
eval(&quot;document.ProdForm.Qty&quot; + i).focus();
return false;
} // End of IF Loop
Mise Le Meas,

Mighty

 

[iza]

! fonts are way tooo small here, and i misread the () : i thought it was :
(eval((&quot;document.myform.Qty&quot; + i).value)
so it sounds like it's working for you now - fine !
SeAL to see your you have to UNcheck &quot;process tgml&quot;