让你的文本框只能输入数字

$.fn.numeral = function() {        
            $(this).css("ime-mode", "disabled");
            this.bind("keypress",function() {
                return event.keyCode >= 48 && 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*/, '');
                } 
            });
        };

然后找到需要进行控制的页面标签元素
$(function(){
    $("#keyword").numeral();
    })