var exPopLimX=180;
var exPopLimY=60;
var exPopInLim=50;
var exPopPopId='pop';
var exPopDimId='popdim';
var exPopMaxDisplays=4;

var exPopCheckScroll=2;
var exPopSkips=3;

/*********************/

var exPopWentIn=0;
var exPopped=0;
var exPopTimesShown=0;
var exPopSinceLast=-1;
var exPopX, exPopY,exPopDim,exPopPop;
var exPopTop=-1;
var exPopBrowser=-1;
var exPopDE=false;
var exPopIEMac=(navigator.userAgent.indexOf("Mac_")>-1)&&(navigator.userAgent.indexOf("MSIE")>-1);

// Use cookies to prevent the popup after it showed once.
// ------------------------------------------------------
function getexpirydate( nodays){
    var UTCstring;
    Today = new Date();
    nomilli=Date.parse(Today);
    Today.setTime(nomilli+nodays*24*60*60*1000);
    UTCstring = Today.toUTCString();
    return UTCstring;
}
function getcookie(cookiename) {
    var cookiestring=""+document.cookie;
    var index1=cookiestring.indexOf(cookiename);
    if (index1==-1 || cookiename=="") return "";
    var index2=cookiestring.indexOf(';',index1);
    if (index2==-1) index2=cookiestring.length;
    return unescape(cookiestring.substring(index1+cookiename.length+1,index2));
}

function setcookie(name,value,duration){
    cookiestring=name+"="+escape(value)+";EXPIRES="+getexpirydate(duration);
    document.cookie=cookiestring;
    if(!getcookie(name)){
    return false;
    }
    else{
        return true;
    }
}


function exPopPopIt(checkSkips) {
    if( getcookie("popnomore") == "" )
    {
        // Dave says: 364 on the next line is 364 days.  Change as you wish.
        // -----------------------------------------------------------------

        setcookie("popnomore",1,364);
        
        var scrolled;
        var popIt=1;
        if (!exPopped) {
            if (checkSkips) {
                if ((exPopSinceLast==exPopSkips)||(exPopSinceLast==-1)) exPopSinceLast=0;
                else {
                    exPopSinceLast++;
                    exPopWentIn=0;
                    popIt=0;
                }
            }
            if (popIt&&((!exPopMaxDisplays)||(exPopTimesShown<exPopMaxDisplays))) {
                exPopDim.style.display='block';
                if (!exPopBrowser)
                    exPopDim.style.height=exPopDE.offsetHeight+exPopDE.scrollTop;
                exPopPop.style.display='block';
                if (exPopTop==-1) exPopTop=exPopPop.offsetTop;
                scrolled=exPopBrowser?exPopDE.pageYOffset:exPopDE.scrollTop;
                exPopPop.style.top=((exPopTop+scrolled)+'px');
                exPopped=1;
                exPopTimesShown++;
            }
        }
    }
}
function exPopUnPop() {
    exPopPop.style.display='none';
    exPopDim.style.display='none';
    exPopped=exPopWentIn=0;
    if (exPopIEMac) {
        window.resizeBy(-1,0);
        window.resizeBy(1,0);
    }
}
function exPopGetPos(myE,checkScroll) {
    if (checkScroll) {
        if (exPopBrowser) {
            exPopX=myE.pageX;
            exPopY=myE.pageY;
        } else {
            exPopX=myE.clientX+exPopDE.scrollLeft;
            exPopY=myE.clientY+exPopDE.scrollTop;
        }
    } else {
        if (exPopBrowser) {
            exPopX=myE.pageX-exPopDE.pageXOffset;
            exPopY=myE.pageY-exPopDE.pageYOffset;
        } else {
            exPopX=myE.clientX;
            exPopY=myE.clientY;
        }
    }
}
function exPopCheck(ifMatch,X,Y) {
    return ((exPopY<Y)&&(exPopX<(X*2-(exPopY*X/Y))))?ifMatch:(1-ifMatch);
}
function exPopMonitor(e) {
    var myE;
    if (!exPopped) {
        if (e) myE=e;
        else if (window.event) myE=window.event;
        else myE=null;
        if (myE) {
            if (exPopBrowser==-1) exPopBrowser=(typeof(myE.pageX)=='number');
            if (exPopBrowser&&(/select|option|optiongroup/i.test(myE.target.tagName))) return true;
            if (exPopWentIn) {
                exPopGetPos(myE,exPopCheckScroll);
                if (exPopCheck(1,exPopLimX,exPopLimY)) exPopPopIt((exPopCheckScroll==2)?0:exPopSkips);
                else if (exPopCheckScroll==2) {
                    exPopGetPos(myE,0);
                    if (exPopCheck(1,exPopLimX,exPopLimY)) exPopPopIt(exPopSkips);
                }
            } else {
                exPopGetPos(myE,0);
                if (exPopCheck(0,exPopLimX+exPopInLim,exPopLimY+exPopInLim)) exPopWentIn=1;
            }
        }
    }
    return true;
}
function exPopInit() {
    if (typeof(window.innerWidth)=='number') exPopDE=window;
    else if (document.documentElement && (typeof(document.documentElement.clientWidth)=='number') &&
        (document.documentElement.clientWidth!=0)) exPopDE=document.documentElement;
    else if (document.body && typeof(document.body.clientWidth=='number')) exPopDE=document.body;
    if (exPopDE) {
        if (document.addEventListener) document.addEventListener('mousemove',exPopMonitor,true);
        else {
            if (typeof(document.all)=='undefined') document.captureEvents(Event.MOUSEMOVE);
            document.onmousemove=exPopMonitor;
        }
    }
    exPopPop=document.getElementById(exPopPopId);
    exPopDim=document.getElementById(exPopDimId);
}
if (document.addEventListener) {
    if (/webkit|safari|khtml/i.test(navigator.userAgent)) {
        function exPopKHTMLInit() {
            /loaded|complete/.test(document.readyState)?exPopInit():setTimeout(exPopKHTMLInit,100);
        }
        exPopKHTMLInit();
    } else document.addEventListener("DOMContentLoaded", exPopInit, false);
} else if (window.attachEvent) window.attachEvent('onload',exPopInit);
else {
    function exPopWinOnLoad(f1,f2) {
        return function() {
            if (f1) f1();
            f2();   
        }
    }
    window.onload=exPopWinOnLoad(window.onload,exPopInit);
}