JQuery里面金额的格式化

/** 
 * 将数值四舍五入(保留2位小数)后格式化成金额形式 
 * 
 * @param num 数值(Number或者String) 
 * @return 金额格式的字符串,如'1,234,567.45' 
 * @type String 
 */  
function formatCurrency(num) {  
    num = num.toString().replace(/\$|\,/g,'');  
    if(isNaN(num))  
    num = "0";  
    sign = (num == (num = Math.abs(num)));  
    num = Math.floor(num*100+0.50000000001);  
    cents = num%100;  
    num = Math.floor(num/100).toString();  
    if(cents<10)  
    cents = "0" + cents;  
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)  
    num = num.substring(0,num.length-(4*i+3))+','+  
    num.substring(num.length-(4*i+3));  
    return (((sign)?'':'-') + num + '.' + cents);  
}  
   
/** 
 * 将数值四舍五入(保留1位小数)后格式化成金额形式 
 * 
 * @param num 数值(Number或者String) 
 * @return 金额格式的字符串,如'1,234,567.4' 
 * @type String 
 */  
function formatCurrencyTenThou(num) {  
    num = num.toString().replace(/\$|\,/g,'');  
    if(isNaN(num))  
    num = "0";  
    sign = (num == (num = Math.abs(num)));  
    num = Math.floor(num*10+0.50000000001);  
    cents = num%10;  
    num = Math.floor(num/10).toString();  
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)  
    num = num.substring(0,num.length-(4*i+3))+','+  
    num.substring(num.length-(4*i+3));  
    return (((sign)?'':'-') + num + '.' + cents);  
}  
  
// 添加金额格式化  
jQuery.extend({  
    formatFloat:function(src, pos){  
        var num = parseFloat(src).toFixed(pos);  
        num = num.toString().replace(/\$|\,/g,'');  
        if(isNaN(num)) num = "0";  
        sign = (num == (num = Math.abs(num)));  
        num = Math.floor(num*100+0.50000000001);  
        cents = num%100;  
        num = Math.floor(num/100).toString();  
        if(cents<10) cents = "0" + cents;  
        for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)  
        num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));  
        return (((sign)?'':'-') + num + '.' + cents);  
    }  
});