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//2009-07-18 Skyeah
//³ý·¨º¯Êý£¬ÓÃÀ´µÃµ½¾«È·µÄ³ý·¨½á¹û
//˵Ã÷£ºjavascriptµÄ³ý·¨½á¹û»áÓÐÎó²î£¬ÔÚÁ½¸ö¸¡µãÊýÏà³ýµÄʱºò»á±È½ÏÃ÷ÏÔ¡£Õâ¸öº¯Êý·µ»Ø½ÏΪ¾«È·µÄ³ý·¨½á¹û¡£
//µ÷ÓãºaccDiv(arg1,arg2)
//·µ»ØÖµ£ºarg1³ýÒÔarg2µÄ¾«È·½á¹û
function accDiv(arg1, arg2) {
    var t1 = 0, t2 = 0, r1, r2;
    try { t1 = arg1.toString().split(".")[1].length } catch (e) { }
    try { t2 = arg2.toString().split(".")[1].length } catch (e) { }
    with (Math) {
        r1 = Number(arg1.toString().replace(".", ""))
        r2 = Number(arg2.toString().replace(".", ""))
        return (r1 / r2) * pow(10, t2 - t1);
    }
}
//¸øNumberÀàÐÍÔö¼ÓÒ»¸ödiv·½·¨£¬µ÷ÓÃÆðÀ´¸ü¼Ó·½±ã¡£
Number.prototype.div = function(arg) {
    return accDiv(this, arg);
}
//³Ë·¨º¯Êý£¬ÓÃÀ´µÃµ½¾«È·µÄ³Ë·¨½á¹û
//˵Ã÷£ºjavascriptµÄ³Ë·¨½á¹û»áÓÐÎó²î£¬ÔÚÁ½¸ö¸¡µãÊýÏà³ËµÄʱºò»á±È½ÏÃ÷ÏÔ¡£Õâ¸öº¯Êý·µ»Ø½ÏΪ¾«È·µÄ³Ë·¨½á¹û¡£
//µ÷ÓãºaccMul(arg1,arg2)
//·µ»ØÖµ£ºarg1³ËÒÔarg2µÄ¾«È·½á¹û
function accMul(arg1, arg2) {
    var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
    try { m += s1.split(".")[1].length } catch (e) { }
    try { m += s2.split(".")[1].length } catch (e) { }
    return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)
}
//¸øNumberÀàÐÍÔö¼ÓÒ»¸ömul·½·¨£¬µ÷ÓÃÆðÀ´¸ü¼Ó·½±ã¡£
Number.prototype.mul = function(arg) {
    return accMul(arg, this);
}
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