Question

i’d like to make a javascript validation that will accept all numeric and decimal point format.

For example :
1,000,000.00 is OK
1.000.000,00 is OK

1.000,000.00 is not OK
1.000,000,00 is not OK
1,000.000,00 is not OK
1,000.000.00 is not OK

Based on what i got here is :
/^[1-9][0-9]{0,2}(,[0-9]{3})*(\.[0-9]{2})?$/ is only valid for 1,000,000.00 not for 1.000.000,00

How can i validate both format ?

Updated :

What if the thousand points are not compulsory such as :
1000000.00 is OK or
1000000,00 is OK

Answer 1

The best way to look at a regular expression this big is to blow it up to
a very large font and split it on the alternatives (|)

var s='1,000,000.00';// tests

var result= /(^\d+([,.]\d+)?$)/.test(s) || // no thousand separator

/((^\d{1,3}(,\d{3})+(\.\d+)?)$)/.test(s) || // comma thousand separator

/((^\d{1,3}(\.\d{3})+(,\d+)?)$)/.test(s); // dot thousand separator

alert(result)

Put together its a brute-

function validDelimNum2(s){
var rx=/(^\d+([,.]\d+)?$)|((^\d{1,3}(,\d{3})+(\.\d+)?)$)|((^\d{1,3}(\.\d{3})+(,\d+)?)$)/;
return rx.test(s);
}

//tests

var N= [
'10000000',
    '1,000,000.00',
    '1.000.000,00',
    '1000000.00',
    '1000000,00',
    '1.00.00',
    '1,00,00',
    '1.000,00',
    '1000,000.00'
]
var A= [];
for(var i= 0, L= N.length; i<L; i++){
    A.push(N[i]+'='+validDelimNum2(N[i]));
}
A.join('\n')

/*  returned values
10000000=true
1,000,000.00=true
1.000.000,00=true
1000000.00=true
1000000,00=true
1.00.00=false
1,00,00=false
1.000,00=true
1000,000.00=false
*/