//trim函数
String.prototype.trim = function()
{
    return this.replace(/(^[\s,，‘'　]*)|([\s,，'’　]*$)/g, "");
}
//取字符串实际长度
String.prototype.Tlength = function(){var arr=this.match(/[^\x00-\xff]/ig);return this.length+(arr==null?0:arr.length);}

//字符串左取
String.prototype.left = function(num,mode){if(!/\d+/.test(num))return(this);var str = this.substr(0,num);if(!mode) return str;var n = str.Tlength() - str.length;num = num - parseInt(n/2);return this.substr(0,num);}

//字符串右取
String.prototype.right = function(num,mode){if(!/\d+/.test(num))return(this);var str = this.substr(this.length-num);if(!mode) return str;var n = str.Tlength() - str.length;num = num - parseInt(n/2);return this.substr(this.length-num);}

//格式化金钱
Number.prototype.FormatMoney =  function()   {  
			var number = this 
            if(number<0)   
                  return   '-'+outputDollars(Math.floor(Math.abs(number)-0)   +   '')   +   outputCents(Math.abs(number)   -   0);   
            else   
                  return   outputDollars(Math.floor(number-0)   +   '')   +   outputCents(number   -   0);   
            
                  }   
    
	function   outputDollars(number)   {   
		if   (number.length<=   3)   
				return   (number   ==   ''   ?   '0'   :   number);   
		else   
		{   
					var   mod   =   number.length%3;   
					var   output   =   (mod   ==   0   ?   ''   :   (number.substring(0,mod)));   
					for   (i=0   ;   i<   Math.floor(number.length/3)   ;   i++)   {   
					if   ((mod   ==0)   &&   (i   ==0))   
						output+=   number.substring(mod+3*i,mod+3*i+3);   
					else   
						output+=   ','   +   number.substring(mod+3*i,mod+3*i+3);   
					}   
		return   (output);   
	}   
}    
function   outputCents(amount)   {   
amount   =   Math.round(   (   (amount)   -   Math.floor(amount)   )   *100);   
return   (amount<10   ?   '.0'   +   amount   :   '.'   +   amount);   
}