check user input for float

[Georg Vassilopulos]

Hello!

How do I check user input for following formats:

I only want to accept floats or integers written as:

232,45
232
242.45
345


accepted values should be from
100 to 30000 (100.00 - 30000.00)

can anyone help me?

I only need the code inside the checkForm() funktion. The basics are clear.


Thank you all!
Georg

 

[Evertjan.]

Georg Vassilopulos wrote on 04 jul 2004 in comp.lang.javascript:

Hello!

How do I check user input for following formats:

I only want to accept floats or integers written as:

232,45
232
242.45
345


accepted values should be from
100 to 30000 (100.00 - 30000.00)

function checkForm(x){
x = x.replace(/,/.'.')
if (!/^\d{3,5}(\.\d\d)?$/.test(x)) return false
x = +x
if (x<100||x>30000) return false
return true
}

I only need the code inside the checkForm() funktion. The basics are
clear.

Sorry, what basics?

 

[Dr John Stockton]

JRS: In article <[email protected]>, seen in

How do I check user input for following formats:

I only want to accept floats or integers written as:

232,45
232
242.45
345


accepted values should be from
100 to 30000 (100.00 - 30000.00)

can anyone help me?

I only need the code inside the checkForm() funktion. The basics are clear.

See <URL:http://www.merlyn.demon.co.uk/js-valid.htm>; I suggest a RegExp

/^[1-9]\d{2,4}([\.,]\d\d)?$/

followed by setting var X = + mycontrol.value
and testing that X <= 3e4 arithmetically.

Checking the upper limit in the RegExp is possible but not reasonable.

 

[Evertjan.]

Dr John Stockton wrote on 04 jul 2004 in comp.lang.javascript:

See <URL:http://www.merlyn.demon.co.uk/js-valid.htm>; I suggest a RegExp

/^[1-9]\d{2,4}([\.,]\d\d)?$/

you need the , by . replace here, I think

 

[Dr John Stockton]

JRS: In article <[email protected]>, seen in

JRS: In article <[email protected]>, seen in
Georg Vassilopulos <[email protected]>
posted at Sun, 4 Jul 2004 14:11:03 :

I only want to accept floats or integers written as:

232,45
232
242.45
345


accepted values should be from
100 to 30000 (100.00 - 30000.00)

can anyone help me?

I only need the code inside the checkForm() funktion. The basics are clear.

See <URL:http://www.merlyn.demon.co.uk/js-valid.htm>; I suggest a RegExp

/^[1-9]\d{2,4}([\.,]\d\d)?$/

followed by setting var X = + mycontrol.value
and testing that X <= 3e4 arithmetically.

Checking the upper limit in the RegExp is possible but not reasonable.

As Evertjan pointed out, substitute dot for comma at some stage, before
conversion to number. If your error message shows the original input,
show that without substitution.