js 小数精确相加 代码

		//js 小数相加精确结果
		function accAdd(arg1, arg2) {
		    if (isNaN(arg1)) {
		        arg1 = 0;
		    }
		    if (isNaN(arg2)) {
		        arg2 = 0;
		    }
		    arg1 = Number(arg1);
		    arg2 = Number(arg2);
		    var r1, r2, m, c;
		    try {
		        r1 = arg1.toString().split(".")[1].length;
		    }
		    catch (e) {
		        r1 = 0;
		    }
		    try {
		        r2 = arg2.toString().split(".")[1].length;
		    }
		    catch (e) {
		        r2 = 0;
		    }
		    c = Math.abs(r1 - r2);
		    m = Math.pow(10, Math.max(r1, r2));
		    if (c > 0) {
		        var cm = Math.pow(10, c);
		        if (r1 > r2) {
		            arg1 = Number(arg1.toString().replace(".", ""));
		            arg2 = Number(arg2.toString().replace(".", "")) * cm;
		        } else {
		            arg1 = Number(arg1.toString().replace(".", "")) * cm;
		            arg2 = Number(arg2.toString().replace(".", ""));
		        }
		    } else {
		        arg1 = Number(arg1.toString().replace(".", ""));
		        arg2 = Number(arg2.toString().replace(".", ""));
		    }
		    return (arg1 + arg2) / m;
		}