How to decimal validation : restricting only two Numeric values to be entered?

Question

there is a jsfiddle which restricts entering only two values after dot JSFiddle . I also need to restrict only two Numeric values before dot like i would like to have values like 55.66 etc.

how to do this in javascript? also allow only Numbers to be entered before and after dot

Answer 1

No need of keypress Instead use onblur and you could use the following regex

function validateFloatKeyPress(el, evt) {
    if (!/^\d\d\.\d\d$/.test(el.value)) {
        alert("Two digits before and after point please!");
    }
}

DEMO

Answer 2

 document.addEventListener('DOMContentLoaded', function () { document.getElementById('input').addEventListener('keypress', function (event) { var value = event.target.value + String.fromCharCode(event.keyCode); if (!(/^\\d{1,2}(\\.$|\\.\\d{1,2}$|$)/).test(value)) { event.preventDefault(); event.stopPropagation(); } }); }); 

 <input id="input" type="text" />