jquery 格式化数字字符串(小数位)

用于页面上格式化数字字符串，此代码为工作时所需，留作笔记，比较常用。

/** 
* author: xg君 
* 描述: 格式化数字字符串，格式化小数位 
* obj为需要格式的对象(例如:input标签) 
* maxLength 为最大小数位长度 
* minLength 为最小小数位长度 
*/
function toFloat(id,maxLength,minLength){
            var htmlVal = $("#"+id).val();
            var index = htmlVal.indexOf(".");
            var result = "";
            if(index > ){
                htmlVal = htmlVal.replaceAll("0+?$","");
                var len =  htmlVal.substring(index+).length;
                if(len > ){
                        if(len > ){
                            result = Number(htmlVal).toFixed(maxLength);
                            result = reToFloat(result,maxLength,minLength);
                        }else{
                            result = Number(htmlVal).toFixed(len);
                            result = result.replaceAll("0+?$","");
                        }
                }else {
                    result = Number(htmlVal).toFixed(minLength);
                }
            }else {
                result = Number(htmlVal).toFixed(minLength);

            }
            $("#"+id).val(result);
        }

function reToFloat(htmlVal,maxLength,minLength){
            var index = htmlVal.indexOf(".");
            var result = "";
            if(index > ){
                htmlVal = htmlVal.replaceAll("0+?$","");
                var len =  htmlVal.substring(index+).length;
                if(len > ){
                        if(len > ){
                            result = Number(htmlVal).toFixed(maxLength);
                        }else{
                            result = Number(htmlVal).toFixed(len);
                            result = result.replaceAll("0+?$","");
                        }
                }else {
                    result = Number(htmlVal).toFixed(minLength);
                }
            }else {
                result = Number(htmlVal).toFixed(minLength);

            }
            return result;

}