jquery文本框只输入数字插件

  //use: $("selector").inputOnlyNum();只输入数字

  (function($) {

      $.fn.inputOnlyNum = function() {

          this.keypress(function(e) {

              if (e.which == 8 || e.keyCode == 9) return true; //Backspace & Tab in ff

              var b = /^[\d\.-]$/.test(String.fromCharCode(e.which));

              if (b) {

                  window.setTimeout(function() {

                      if (isNaN($(e.target).val()) && $(e.target).val() != '-') { $(e.target).val(''); }

                  }, 10);

              }

              return b;

          }).bind("paste", function() { return !isNaN(clipboardData.getData('text')); })

                 .bind("dragenter", function() { return false; }).css("ime-mode", "disabled");

      };

  })(jQuery);