// 传入字符串,返回保留两位小数的数字
getFloat2: function(x){
if (x != '.'){
var f = Math.round(x * 100) / 100;
var s = f.toString();
var rs = s.indexOf('.');
if (rs <= 0) {
rs = s.length;
s += '.';
}
while (s.length <= rs + 2) {
s += '0';
}
return s;
}else{
return '0.00';
}
},