// 随机生成数值方法
function random(range){//支持负数范围
    var max = Math.max(range[0],range[1]);
    var min = Math.min(range[0],range[1]);

    var diff = max - min;
    var number = Math.ceil((Math.random() * diff + min));
    return number;
}

//  输出所有的海报方法

var data = data;

function addPhotos(){
    var template = g('#wrap').innerHTML;
    var html = [];
    var nav = [];

    for (var i = 0; i < data.length; i++) {
        var _html = template.replace('{{index}}',i)
                            .replace('{{img}}',data[i].img)
                            .replace('{{caption}}',data[i].caption)
                            .replace('{{desc}}',data[i].desc);
        html.push(_html);
        // console.log(_html);
        nav.push('<span id="nav_'+i+'" class="i" onclick="turn(g(\'#photo_'+i+'\'))">&nbsp;</span>');
    }

    html.push('<div class="nav">'+nav.join('')+'</div>');

    g('#wrap').innerHTML = html.join('');

    posterSort(random([0,data.length-1]));
    
}

addPhotos();

// 海报排序方法

function posterSort (n) {
    var photo_center = g('#photo_' + n);
    photo_center.className += ' photo_center';
}