var showad = true;
var Toppx = 60; 		//上端位置
var AdDivW = 115; 	//宽度
var AdDivH = 360; 	//高度
var PageWidth = 1024; //页面多少宽度象素下正好不出现左右滚动条
var MinScreenW = 1024; //显示广告的最小屏幕宽度象素
var leftDivID = "Javascript.LeftDiv";
var rightDivID = "Javascript.RightDiv";

documentWriteAD();

function scall() {
    if (!showad) { return; }
//    if (window.screen.width <= MinScreenW) {
//        alert("临时提示：\n\n显示器分辨率宽度小于" + MinScreenW + ",不显示广告");
//        showad = false;
//        document.getElementById(leftDivID).style.display = "none";
//        document.getElementById(rightDivID).style.display = "none";
//        return;
//    }

    //var Borderpx = ((window.screen.width - PageWidth) / 2 - AdDivW) / 2;
    var JavascriptLeftDiv = document.getElementById(leftDivID);
    var JavascriptRightDiv = document.getElementById(rightDivID);
    if (JavascriptLeftDiv.style != "none") {
        JavascriptLeftDiv.style.top = getScrollTop() + Toppx + "px";
        JavascriptLeftDiv.style.left = document.body.scrollLeft + 6.8 + "px";
    }
    if (JavascriptRightDiv.style != "none") {
        JavascriptRightDiv.style.top = getScrollTop() + Toppx + "px";
        //JavascriptRightDiv.style.left = document.body.scrollLeft + Borderpx + "px";
    }
}

function getScrollTop() {
    if (window.pageYOffset) {
        return window.pageYOffset;
    }
    else if (document.documentElement && document.documentElement.scrollTop) {
        return document.documentElement.scrollTop;
    }
    else if (document.body) {
        return document.body.scrollTop;
    }
}


function hidead() {
    showad = false;
    document.getElementById(leftDivID).style.display = "none";
    document.getElementById(rightDivID).style.display = "none";
}

function showRightDiv() {
    document.getElementById(leftDivID).style.display = "none";
    document.getElementById(rightDivID).style.display = "";
}

function showLeftDiv() {
    document.getElementById(leftDivID).style.display = "";
    document.getElementById(rightDivID).style.display = "none";
}


//function hidead1(divID) {
//    var JavascriptLeftDiv = document.getElementById(leftDivID);
//    var JavascriptRightDiv = document.getElementById(rightDivID);
//    JavascriptLeftDiv.style.display = "none";
//    JavascriptRightDiv.style.display = "none";
//    if (divID == leftDivID) {
//        JavascriptLeftDiv.style.display = "";
//    }
//    else if (divID == rightDivID) {
//    JavascriptRightDiv.style.display = "";
//    }
//}

window.onscroll = scall;
window.onresize = scall;
window.onload = scall;