Use this DOM
<input type='text' onkeypress='validate(evt)' />
And below is the script
function validate(evt) { var theEvent = evt || window.event; // Handle paste if (theEvent.type === 'paste') { key = event.clipboardData.getData('text/plain'); } else { // Handle key press 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(); } }

Use this DOM
<input type='text' onkeypress='validate(event)' />
And this script
function validate(evt) { var theEvent = evt || window.event;
// Handle paste if (theEvent.type === 'paste') { key = event.clipboardData.getData('text/plain'); } else { // Handle key press 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(); } }