function leftAdInit() {
    var leftDivID = "leftFloat";
    document.getElementById(leftDivID).style.posTop = -200;
    document.getElementById(leftDivID).style.visibility = 'visible'
    MoveLeftLayer(leftDivID);

}
function MoveLeftLayer(layerName) {
    var x = 2;
    var y = 150; //离顶部的距离
    var diff = (document.documentElement.scrollTop + y - document.getElementById(layerName).style.posTop)*.40;
    var y = document.documentElement.scrollTop + y - diff;
    document.getElementById(layerName).style.posTop = y;
    document.getElementById(layerName).style.posLeft = x;
    setTimeout("MoveLeftLayer('" + layerName + "');", 20);
}
leftAdInit()

function rightAdInit() {
       
    var rightDivID = "rightFloat";
    document.getElementById(rightDivID).style.posTop = -200;
    document.getElementById(rightDivID).style.visibility = 'visible'
    MoveRightLayer(rightDivID);
}
function MoveRightLayer(layerName) {
    var x = 2;
    var y = 150; //离顶部的距离
    var diff = (document.documentElement.scrollTop + y - document.getElementById(layerName).style.posTop)*.40;
    var y = document.documentElement.scrollTop + y - diff;
    document.getElementById(layerName).style.posTop = y;
    document.getElementById(layerName).style.posRight = x;
    setTimeout("MoveRightLayer('" + layerName + "');", 20);
}
rightAdInit()