Restrict input field to two decimals with jQuery

Question

I have an input field which I want to restrict so that the user only can input a number with the maximum of two decimals. Want to do this using jQuery.

Could I use j

Answer 1

The following function will restrict decimals according to your need of decimal places and also restrict more than one dot

function check_digit(e,obj,intsize,deczize) {
    var keycode;

    if (window.event) keycode = window.event.keyCode;
    else if (e) { keycode = e.which; }
    else { return true; }

    var fieldval= (obj.value),
        dots = fieldval.split(".").length;

    if(keycode == 46) {
        return dots <= 1;
    }
    if(keycode == 8 || keycode == 9 || keycode == 46 || keycode == 13 ) {
        // back space, tab, delete, enter 
        return true;
    }          
    if((keycode>=32 && keycode <=45) || keycode==47 || (keycode>=58 && keycode<=127)) {
         return false;
    }
    if(fieldval == "0" && keycode == 48 ) {
        return false;
    }
    if(fieldval.indexOf(".") != -1) { 
        if(keycode == 46) {
            return false;
        }
        var splitfield = fieldval.split(".");
        if(splitfield[1].length >= deczize && keycode != 8 && keycode != 0 )
            return false;
        }else if(fieldval.length >= intsize && keycode != 46) {
            return false;
        }else {
            return true;
        }
    }
}