function paging(options,idname) {
    let defaultvalue = {
        total: totalcount,
        current:  1,
        firsttext: '首页',
        prevtext: '上一页',
        nexttext: '下一页',
        lasttext: '尾页',
        pagesize:2,
        pagenum: 5,
        container: document.getelementbyid(idname)
    }
    this.options = object.assign({}, defaultvalue, options);
    this.show();
    this.pageclick()
}
paging.prototype.show = function() {
    let disable = "";
    let pagetotalnum = this.getpagetotalnum();
    this.options.container.innerhtml = "";
    if (this.options.current === 1) {
        disable = 'disable'
    }

    this.createelement('first cursora ' + disable, this.options.firsttext);
    this.createelement('prev cursora ' + disable, this.options.prevtext);
//    this.createnumelement();
//    disable = ""
 //   if (this.options.current === pagetotalnum) {
//        disable = 'disable'
//    }
    this.createelement('next cursora ' + disable, this.options.nexttext);
    this.createelement('last cursora ' + disable, this.options.lasttext);
    this.createelement('total cursora ' + disable, "总"+this.options.total+"条记录");
    let span = document.createelement('span');
    let i = `<i>第${this.options.current}</i>/<i>${pagetotalnum}页</i>`;
    span.innerhtml = i;
    this.options.container.appendchild(span)
}
paging.prototype.createnumelement = function() {
    let min = this.options.current - math.floor(this.options.pagenum / 2);
    if (min < 1) {
        min = 1;
    }
    let max = min + this.options.pagenum - 1;
    let pagetotalnum = this.getpagetotalnum();
    if (max > pagetotalnum) {
        max = pagetotalnum;
    }
    let active = "";
    for (let i = min; i <= max; i++) {
        if (this.options.current === i) {
            active = 'active';
        } else {
            active = '';
        }
        this.createelement('pagingnormal ' + active, i);
        //this.onclick(function(){$(this).show()})
    }
}
paging.prototype.createelement = function(specialstyle, content) {
    let odiv = document.createelement('a');
    odiv.classname = specialstyle;
    odiv.innertext = content;
    this.options.container.appendchild(odiv);
}
paging.prototype.getpagetotalnum = function() {
    return math.ceil(this.options.total / this.options.pagesize)
}
paging.prototype.pageclick = function() {
    let _this = this;
    let pagetotalnum = this.getpagetotalnum();
    this.options.container.addeventlistener('click', function(e) {
        if (e.target.classlist.contains('first')) {
            _this.topage(1);
            showlist(1);
        } else if (e.target.classlist.contains('prev')) {
            _this.topage(_this.options.current - 1);
            showlist(_this.options.current);
        } else if (e.target.classlist.contains('next')) {
            _this.topage(_this.options.current + 1);
            showlist(_this.options.current);
        } else if (e.target.classlist.contains('last')) {
            _this.topage(pagetotalnum);
            showlist(pagetotalnum);
        } else if (e.target.classlist.contains('pagingnormal')) {
            _this.topage(+e.target.innertext);
            showlist(+e.target.innertext);
        }
    })
}
paging.prototype.topage = function(page) {
    let pagetotalnum = this.getpagetotalnum();
    if (page < 1) {
        page = 1;
    }
    if (page > pagetotalnum) {
        page = pagetotalnum;
    }
    this.options.current = page;
    this.show()
}