Archive for December 20th, 2008

Accept only positive number using Jquery

Saturday, December 20th, 2008

Có thể sử dụng Event Handling hoặc Event Helper. Tất nhiên là sử dụng Event Helper thì ngắn hơn rồi :)

?View Code JAVASCRIPT
1
2
3
4
5
6
7
8
9
10
11

//when key is pressed in the textbox
$("#quantity").keypress(function (e)
{
  //if the letter is not digit then display error and don't type anything
  if( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57))
  {
    //display error message
    $("#errmsg").html("Digits Only").show().fadeOut("slow");
    return false;
  }
});

Mình quen viết thế này hơn:

?View Code JAVASCRIPT
1
2
3
4
5
6
7
8
9
10
11
12

//when key is pressed in the textbox
$("#quantity").keypress
(
    function (e) {
        //if the letter is not digit then display error and don't type anything
        if( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57)) {
            //display error message
            $("#errmsg").html("Digits Only").show().fadeOut("slow");
            return false;
        }
    }
);

Nguồn: http://roshanbh.com.np/2008/04/textbox-accept-only-numbers-digits.html

Posted in jQuery | 4 Comments »