//从大到小排序
function compareBigToSmall(property){
    return function(a,b){
        var value1 = a[property];
        var value2 = b[property];
        return  value2 - value1;
    }
};
//从小到大排序
function compareSmallToBig(property){
    return function(a,b){
        var value1 = a[property];
        var value2 = b[property];
        return   value1-value2;
    }
};