ext numberfield添加金额输入效果

        if (Ext.form.NumberField) {            Ext.apply(Ext.form.NumberField.prototype,{    decimalPrecision: 2,    // allowNegative :false,    allowDecimals: true    // allowBlank : false,    cls: 'numReadOnly'    // private,    FormatComma: true    // private,    initEvents: function () {        Ext.form.NumberField.superclass.initEvents.call(this);        var allowed = this.baseChars + '';        if (this.allowDecimals) {            allowed += this.decimalSeparator;        }        if (this.FormatComma) {            allowed += ",";        }        if (this.allowNegative) {            allowed += "-";        }        this.stripCharsRe = new RegExp('[^' + allowed + ']', 'gi');        var keyPress = function (e) {            var k = e.getKey();            if (!Ext.isIE&& (e.isSpecialKey()|| k == e.BACKSPACE || k == e.DELETE)) {                return;            }            var c = e.getCharCode();            if (allowed.indexOf(String.fromCharCode(c)) === -1) {                e.stopEvent();            }        };        this.el.on("keypress", keyPress, this);    },    // private    validateValue: function (value) {        var tmpvalue = this.removeCommas(String(value));        if (!Ext.form.NumberField.superclass.validateValue.call(this, tmpvalue)) {            return false;        }//        if (!Ext.form.NumberField.superclass.validateValue//.call(this, value)) {//            return false;//        }        if (value.length < 1) { // if it's blank            // and textfield            // didn't flag            // it then it's            // valid            return true;        }        if (this.FormatComma) {            value = this.removeCommas(String(value));        }        value = String(value).replace(this.decimalSeparator, ".");        if (isNaN(value)) {            this.markInvalid(String.format(this.nanText, value));            return false;                   }        var num = this.parseValue(value);        if (num < this.minValue) {            this.markInvalid(String.format(this.minText,this.minValue));            return false;        }        if (num > this.maxValue) {            this.markInvalid(String.format(this.maxText,this.maxValue));            return false;        }        return true;    },    fixPrecision: function (value) {        var nan = isNaN(value);        if (!this.allowDecimals|| this.decimalPrecision == -1|| nan || !value) {            return nan ? '' : value;        }        return parseFloat(parseFloat(value).toFixed(this.decimalPrecision));    },    setValue: function (v) {        v = typeof v == 'number' ? v : (String(this.removeCommas(v)).replace(this.decimalSeparator, "."));        v = isNaN(v) ? '' : String(v).replace(".", this.decimalSeparator);        if (String(v).length > 0)            v = parseFloat(v).toFixed(this.decimalPrecision);        // if(this.FormatComma)        // v=this.formatCommaStyle(v);        Ext.form.NumberField.superclass.setValue.call(this, v);        if (this.FormatComma&& String(v).length > 0) {            v = this.addCommas(v);            Ext.form.NumberField.superclass.setRawValue.call(this, v);        }    },    parseValue: function (value) {        if (this.FormatComma)            value = this.removeCommas(String(value));        value = parseFloat(String(value).replace(this.decimalSeparator,"."));        return isNaN(value) ? '' : value;    },    beforeBlur: function () {        var v = this.parseValue(this.getRawValue());        if (String(v).trim().length > 0) {            this.setValue(this.fixPrecision(v));        }    },    addCommas: function (nStr) {        nStr += '';        if (nStr.length == 0)            return '';        x = nStr.split('.');        x1 = x[0];        x2 = x.length > 1 ? '.' + x[1] : '';        var rgx = /(\d+)(\d{3})/;        while (rgx.test(x1)) {            x1 = x1.replace(rgx,'$1' + ',' + '$2');        }        return x1 + x2;    },    removeCommas: function (nStr) {        nStr = nStr + '';        var r = /(\,)/;        while (r.test(nStr)) {            nStr = nStr.replace(r, '');        }        return nStr;    }});        }

这个是网上搜到了，稍微修改了下，原先的有个问题，就是在进行form验证的时候，无法通过，总是先试试不是有效值，这个就没有问题了