array index

cjkenworthy · Oct 11, 2002

In vbscript I have done arrays like

for i=0 to whatever

response.write(txttermno(i))

next

to output each array value. I want to do something similar in javascript:

for (i = 1; i<=javacount; i++) {

var value = document.frmtermno.txttermno + i + .value;

alert(value)

}

I know that this is the wrong syntax. What is the correct syntax so that I can achieve txttermno(i)?

cheers

kim1234 · Oct 11, 2002

Try this:

Code:

for (i = 1; i<=document.frmtermno.txttermno.length; i++) {

var value = document.frmtermno.txttermno[i].value;

alert(value)

}

Note: If you've automatically populated your array, the initial index is 0 (zero), not 1, and so you may need to intialize your for loop like this instead:

Code:

for (i = 0; i<document.frmtermno.txttermno.length; i++)

Hope this helps.
Ciao, K----------------
"If you were supposed to understand it, we wouldn't call it code" - FedEx

cjkenworthy · Oct 11, 2002

I have a form with an onSubmit="return checkform(this)"

I have a variable number of fields in the form: txttermno1, txttermno2 etc...

In the <HEAD> i have the function:

function checkform(frmtermno) {

var invalid = " ";
var javacount = document.frmtermno.hdnrecords.value;

for (i = 0; i < javacount; i++) {

if (document.frmtermno.txttermno.value =="&quot {
alert("You did not enter a Termination Number for number"
return false;
}

if (document.frmtermno.txttermno.value.indexOf(invalid) > -1) {
alert("No spaces permitted in a Termination number for number"
return false;
}

}
}

BUT i get the error: "Object Expected"

Any ideas?

cjkenworthy · Oct 11, 2002

In fact I get the error:

"document.frmtermno.txttermno is not an object"

when the form is submitted - any ideas now?

kim1234 · Oct 11, 2002

Could you post the form (or part of the form) that your working with? Hope this helps.
Ciao, K----------------
"If you were supposed to understand it, we wouldn't call it code" - FedEx

cjkenworthy · Oct 11, 2002

its just a standard form with input text boxes named txttermno1, txttermno2 etc...

the boxes are created using an ASP for loop dependant on how many records I have from an ADO recordset.

I'll post it in 2 days when i am back in work.

thanks

cjkenworthy · Oct 14, 2002

The Form is called: "termno" and the ASP generates a number of text beoxes dependent on how many records there are:

'in a loop until k = number of records

response.write("<input type=""text"" name=""txttermno" & Trim(k) & """ maxlength=""11"" size=""11""&quot

'loop close

the OnSubmit action is: OnSubmit="checkform(this)"

so what I need to do is check each txttermno(I) for blanks or spaces:

function checkform(termno) {

var invalid = " ";
var javacount = document.termno.hdnrecords.value;

for (i = 1; i<=javacount; i++) {

if (document.termno.txttermno.value =="&quot {
alert("You did not enter a Termination Number for number1 "
return false;
}

if (document.termno.txttermno.value.indexOf(invalid) > -1) {
alert("No spaces permitted in a Termination number for number1"
return false;
}

}

}

It doesn't seem to recognise document.termno.txttermno.value as a valid object.

Any Ideas?

kim1234 · Oct 14, 2002

Going back to your first example:

Code:

for (i = 1; i<=javacount; i++) {
    var value = document.frmtermno.txttermno + i + .value;
    alert(value)
}

Try this instead:

Code:

for (i = 1; i<=javacount; i++) {
    var value = eval(&quot;document.frmtermno.txttermno&quot; + i + &quot;.value&quot;);
    alert(value)
}

The reference to the textbox object needs to be built as a string (in order to add/concatenate the variable number) and then converted ("eval()&quot

into the object reference.

Kim-
It is easier to square a circle than to get round a mathematician. Augustus de Morgan

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array index

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