function preloadImages() { //v3.0
    var d=document; if(d.images){ if(!d.p) d.p=new Array();
    var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function findObj(n, d) { //v4.0
    var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
    if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
    for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
    if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function swapImage() { //v3.0
    var i,j=0,x,a=swapImage.arguments; document.sr=new Array; for(i=0;i<(a.length-2);i+=3)
    if ((x=findObj(a[i]))!=null){document.sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function swapImgRestore() { //v3.0
    var i,x,a=document.sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function isNetscape4() {
    return (navigator.appVersion.substring(0,1) == "4" && navigator.appName == "Netscape");
}

function openScreenshot(url) {
    window.open(url, "_blank","width=890,height=710,left=10,top=10,resizable=yes");
}

function openSmallScreenshot(url) {
    window.open(url, "_blank","width=890,height=710,left=10,top=10,resizable=yes");
}

function openMediumScreenshot(url) {
    window.open(url, "_blank","width=940,height=740,left=10,top=10,resizable=yes");
}

function openLargeScreenshot(url) {
    window.open(url, "_blank","width=1200,height=850,left=3,top=3,resizable=yes");
}

function openTutorial(url) {
    window.open(url, "_blank","width=840,height=670,left=10,top=10,resizable=yes");
}

function toggleExplanation(id) {
    if (document.getElementById(id + ".paragraph").style.display == "none") {
        showExplanation(id);
    } else {
        hideExplanation(id);
    }
}

function showExplanation(id) {
    var displayValue = "table-row";
    if (navigator.appName=="Microsoft Internet Explorer") {
        displayValue = "block";
    }
    document.getElementById(id + ".paragraph").style.display = displayValue;
    document.getElementById(id + ".link").firstChild.nodeValue = "<< Less";
}

function hideExplanation(id) {
  document.getElementById(id + ".paragraph").style.display = "none";
  document.getElementById(id + ".link").firstChild.nodeValue = "More >>";
}

function toggleAllExplanations(targetId, show) {

    var items = document.getElementsByTagName("a");
    var foundHidden = false;
    for (var i = 0; i < items.length; i++) {
        var id = items[i].id;
        if (id.indexOf(".") > 0 && id.length >= targetId.length && id.substr(0, targetId.length) == targetId) {
            var baseId = id.substring(0, id.indexOf("."));
            if (show) {
                if (document.getElementById(baseId + ".paragraph").style.display == "none") {
                    showExplanation(baseId);
                    foundHidden = true;
                }
            } else {
                hideExplanation(baseId);
            }
        }
    }
    if (show && !foundHidden) {
        toggleAllExplanations(targetId, false);
    }
}