//小数点数字相乘 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) } //把小数点数字四舍五入保留两位数字 function Floatvar(floatvar){ var f_x = parseFloat(floatvar); if (isNaN(f_x)){ return '0.00'; } var f_x = Math.round(f_x*100)/100; var s_x = f_x.toString(); var pos_decimal = s_x.indexOf('.'); if (pos_decimal < 0){ pos_decimal = s_x.length; s_x += '.'; } while (s_x.length <= pos_decimal + 2){ s_x += '0'; } return s_x; }
上一篇php随机生成字符串