jquery keyup function check if number

Question

i am trying to create an input field where the user can only type in numbers. this function is already working almost fine for me:

        $(\'#p_first\').k         


        

Answer 1

Try binding to the keypress event instead of keyup. It gets fired repeatedly when a key is held down. When the key pressed is not a number you can call preventDefault() which will keep the key from being placed in the input tag.

   $('#p_first').keypress(function(event){

       if(event.which != 8 && isNaN(String.fromCharCode(event.which))){
           event.preventDefault(); //stop character from entering input
       }

   });

Working Example: http://jsfiddle.net/rTWrb/2/