How to prevent entering multiple + in a textbox in jquery

Question

My current code is like this

$('.textBoxClass').bind('keypress', function (e) {
    return (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57) && e.which != 46 && e.which != 43) ? false : true;
});

Answer 1

Use the jQuery keyup event .

You need to check if event.keyCode is + and if input field already contains + .

If yes, you can prevent the event with event.preventDefault() .

Or you can use some third-part plugin like jqueryvalidation and use a regular expression.

Remember to validate the data serverside because javascript validation can be easily bypassed.