jquery只好输入数值的text框 _Web前端

jquery只能输入数值的text框

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>Untitled Document</title>
     <script type="text/javascript" src="jquery-1.4.2.min.js"></script>
    </head>
    <script type="text/javascript">
        $.fn.numeral = function() {
            $(this).css("ime-mode", "disabled");
            this.bind("keypress",function() {
                if (event.keyCode == 46) {
                    if (this.value.indexOf(".") != -1) {
                        return false;
                    }
                } else {
                    return event.keyCode >= 46 && event.keyCode <= 57;
                }
            });
            this.bind("blur", function() {
                if (this.value.lastIndexOf(".") == (this.value.length - 1)) {
                    this.value = this.value.substr(0, this.value.length - 1);
                } else if (isNaN(this.value)) {
                    this.value = "";
                }
            });
            this.bind("paste", function() {
                var s = clipboardData.getData('text');
                if (!/\D/.test(s));
                value = s.replace(/^0*/, '');
                return false;
            });
            this.bind("dragenter", function() {
                return false;
            });
            this.bind("keyup", function() {
            if (/(^0+)/.test(this.value)) {
                this.value = this.value.replace(/^0*/, '');
                } 
            });
        };
    </script>
    <body>
        <input type="text" id="txt1">
        <input type="text" id="Text2">
    </body>
 
 <script type="text/javascript">
  $("#txt1").numeral();
 </script>
</html>

或者

$("#joinYears").keyup(function(){   
        var tmptxt=$(this).val();   
        $(this).val(tmptxt.replace(/\D|^/g,''));   
    }).bind("paste",function(){   
        var tmptxt=$(this).val();   
        $(this).val(tmptxt.replace(/\D|^/g,''));   
    }).css("ime-mode", "disabled");