razor - javascript to allow only negative and positive numbers and decimal upto 6 digits on keypress -


i need validate textbox in cshtml page accept negative or positive numbers , upto 6 decimal places. have tried far.

function acceptuptosixdecimalplaceswithnegative(event, elem) {  if ((event.which != 46 || $(elem).val().indexof('.') != -1) && (event.which < 48 || event.which > 57)) {     if (event.keycode !== 8 && event.keycode !== 46 && event.keycode !== 9 && event.keycode !== 0 && event.keycode !== 45) { //exception         event.preventdefault();     } }  var text = $(elem).val();  if ((text.indexof('.') != -1) && (text.substring(text.indexof('.')).length > 6)) {     if (event.keycode !== 8 && event.keycode !== 46 && event.keycode !== 9) { //exception         event.preventdefault();     } }

this helping me achieve 6 digits after decimal point allows special characters , alphabets too.

any problem appreciated.

thanks.

you check value regex:

var re = /^-?\d*\.?\d{0,6}$/;  var text = $(elem).val();  var isvalid = (text.match(re) !== null);

the regex means:

^ : beginning of string

-? : 1 or 0 "-"

\d* : 0 infinite numbers

\.? : 0 or 1 "."

\d{0,6} : 0 6 numbers

$ : end of string


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