var pagenum = 12; // 每页条数
var outlines;
var pagecount = 0; //总页数
var cp = document.getelementbyid("pagejump");
var filebody = document.getelementbyid("content");
var pagecounttext = document.getelementbyid("pagecount");


function fakepage(num) {
    // pagenum = num;
    pagenum = 12;
    outlines = document.getelementbyid("newslist").getelementsbytagname("li"); //概览记录对象
    if (outlines.length % pagenum > 0) {
        pagecount = ((outlines.length - (outlines.length % pagenum)) / pagenum + 1);
    } else {
        pagecount = outlines.length / pagenum;
    }
    pagecounttext.innerhtml = "共" + pagecount + "页";
    topage(1);
}


function getcurrpage(_currentpage) {
    var cpage = 1;
    if (_currentpage <= 0 || _currentpage == "")
        cpage = 1;
    else if (_currentpage > pagecount)
        cpage = pagecount;
    else
        cpage = _currentpage;
    return cpage;
}
/**
 * goto()直接跳转函数
 */
function goto() {
    topage(cp.value);
}

function topage(_pagenum) {
    var cp = getcurrpage(_pagenum);
    var startpos = cp * pagenum - pagenum;
    var endpos = 0;
    if (cp * pagenum > outlines.length)
        endpos = outlines.length;
    else
        endpos = cp * pagenum;
    for (var i = 0; i < outlines.length; i++) {
        if ((i >= startpos) && (i < endpos)) {
            outlines[i].style.display = "block";
            
        } else {
            outlines[i].style.display = "none";
        }
    }
    cp.value = cp;
    showpagelinenum();
    return false;
}
/**
 * showpagelinenum()页面显示状态条函数
 */
function showpagelinenum() {
    var pl = "";
    if (cp.value != 1) {
        pl += "<a href='javascript:void(0);'  onclick='topage(" + (cp.value - 1) + ")'>上一页</a>";
    } else {
        pl += "<span class='sdisable'>上一页</span>";
    }
    for (var pagen = 1; pagen <= pagecount; pagen++) {
        if (pagen == cp.value) {
            //pl += "<strong>"+pagen+"</strong>";
        } else {
            //pl += "<a href='javascript:void(0);' onclick='topage("+pagen+")'>"+pagen+"</a>";
        }
    }
    if (cp.value < pagecount) {
        pl += "<a href='javascript:void(0);' onclick='topage(" + ((cp.value) * 1 + 1) + ")'>下一页</a>";
    } else {
        pl += "<span class='sdisable'>下一页</span>";
    }
    document.getelementbyid("pagedec").innerhtml = pl;
}