js控制文本栏只能输入数字

Html代码

 <input type="text" id="txt1">  

 <input type="text" id="txt1">

Html代码

<script type="text/javascript">  

$("#txt1").numeral();   

</script>  

<script type="text/javascript">  $("#txt1").numeral(); </script>

Js代码

$.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*/, '');   

            });   

        };