js小数的验证
/** * str 传入字符串 * len 字符串长度 * i 小数点限定位数**/function check(str,len,i){if(str.length>len){alert("超长");return false;}var s = '^\\d+(\\.\\d{1,'+i+'})?$';var re = new RegExp(s);alert(re.test(str));if(!re.test(str)){return false;}else{return true;}}