js判断价格和金额方法

    function isPriceNumber(_keyword){
        if(_keyword == "0" || _keyword == "0." || _keyword == "0.0" || _keyword == "0.00"){
            _keyword = "0"; return true;
        }else{
            var index = _keyword.indexOf("0");
            var length = _keyword.length;
            if(index == 0 && length>1){/*0开头的数字串*/
                var reg = /^[0]{1}[.]{1}[0-9]{1,2}$/;
                if(!reg.test(_keyword)){
                    return false;
                }else{
                    return true;
                }
            }else{/*非0开头的数字*/
                var reg = /^[1-9]{1}[0-9]{0,10}[.]{0,1}[0-9]{0,2}$/;
                if(!reg.test(_keyword)){
                    return false;
                }else{
                    return true;
                }
            }            
            return false;
        }
    }