jquery - Html and javascript input validation -

i trying have input accept numbers , '.', working great doesn't allow number pad number keys. cant seem find exact answer online.

html

<input type="text" id="itemtotal#i#" name="itemtotal#i#" value="#qpriceact#" onkeypress="return isnumeric(event)" onkeydown="return keyispressed(event);"> 

javascript

//prevent , , $ being input function keyispressed(e){     var charval= string.fromcharcode(e.keycode);     if(isnan(charval) && (e.which != 8 ) && (e.which != 190 )){         return false;     }     return true; }   //is input numeric function isnumeric (evt) {   var theevent = evt || window.event;   var key = theevent.keycode || theevent.which;   key = string.fromcharcode (key);   var regex = /[0-9]|\./;   if ( !regex.test(key) ) {     theevent.returnvalue = false;     if(theevent.preventdefault) theevent.preventdefault();   } } 

thanks help!

the best way believe add class inputs allow numbers. can restrict input doesn't match pattern or number/decimal.

function numberverfication(value) {    var pattern=/^[0-9]*(\.)?[0-9]*$/;    if (value.match(pattern) != null){      return value    }    else {      var p=/[0-9]*(\.)?[0-9]*/;      return value.match(p)[0];    }    }  $('.numbersonly').keyup(function(e) {    e.target.value = numberverfication(e.target.value);  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <input class='numbersonly' type="text" id="itemtotal#i#" name="itemtotal#i#" value="#qpriceact#">