Question

How to prevent or validate the user entering numbers 6 digits with range (eg: 100000) and two decimal digits in a textbox using javascript ?
I m using onkeypress event in my textbox my code is:

      var txtBudget = document.getElementById('MainContent_txtBudget');
        txtBudget.addEventListener('keypress', function (evt)
        {  
        var value = this.value + String.fromCharCode(evt.which);
        if (!/^\d{0,6}(?:\.\d{0,2})?$/.test(value)) 
           {   
             evt.preventDefault();
           }
       },
 false);​

Answer 1

With HTML5 input type='number' there is no need to use javascript for this validation. Say for example you want a number between 100,000.00 and 200,000 with two decimal digits, use this in your HTML

Number: <input type="number" name="number" min="100000.00" max="200000" step='0.01'/>