记录输入框输入数字

$(function(){
    
 //文本框只能输入数字，并屏蔽输入法和粘贴  
 $.fn.numeral = function() {     
            $(this).css("ime-mode", "disabled");     
            this.bind("keypress",function(e) {     
            var code = (e.keyCode ? e.keyCode : e.which);  //兼容火狐 IE      
                if(!$.browser.msie&&(e.keyCode==0x8))  //火狐下不能使用退格键     
                {     
                     return ;     
                    }     
                    return code >= 48 && code<= 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*/, '');     
                }     
            });     
        };    
        //调用文本框的id  
  $("#score").numeral();   
 
});