jquery only allow input float number

Question

i\'m making some input mask that allows only float number. But current problem is I can\'t check if multiple dots entered. Can you check those dots and prevent it for me?

Answer 1

Using JQuery.

$(document).ready(function()
     {
        //Only number and one dot
        function onlyDecimal(element, decimals)
        {
            $(element).keypress(function(event)
            {
                num = $(this).val() ;
                num = isNaN(num) || num === '' || num === null ? 0.00 : num ;
                if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57))
                {
                    event.preventDefault();

                }
                if($(this).val() == parseFloat(num).toFixed(decimals))
                {
                    event.preventDefault();
                }
            });
        }

         onlyDecimal("#TextBox1", 3) ;



    });