function preloadLearningImages() {
    var learningImages = "'help/images/how_reg_over.gif', 'help/images/how_lnch_over.gif'," +
                         "'help/images/how_stat_over.gif', 'help/images/how_cert_over.gif'" +
                         "'img/back_over.gif', 'img/next_over.gif', 'img/clear_over.gif'" +
                         "'img/find_over.gif', 'img/quit_over.gif', 'img/find_over_grey.gif'" + 
                         "'img/help_btn_over.gif', 'img/notes_over.gif'";
    MM_preloadImages(learningImages);
}

function preloadAdminImages() {
    var adminImages = "'help/images/how_import_over.gif', 'help/images/how_online_over.gif'," +
                         "'help/images/how_reports_over.gif', 'help/images/how_details_over.gif'" +
                         "'img/back_over.gif', 'img/next_over.gif', 'img/clear_over.gif'" +
                         "'img/find_over.gif'";
    MM_preloadImages(adminImages);
}

function onClose() {
    if (window.event.clientY < 0 && window.event.clientX < 0) {
        if (window.opener != null) {            
            window.opener.location.href="home.jsp";
        }
    }
}

function openChild(toolbar, menubar, width, height, url) {
    var winLeft = (screen.width - width)/2;
    var winTop = (screen.height - height)/2;
    var child = window.open(url, "child"+(new Date().getTime()), "menubar="+menubar+",toolbar="+toolbar+",scrollbars=yes,resizable=yes,status=no,width="+width+",height="+height+",left="+winLeft+",top="+winTop);
    child.focus();
}

function openDialog(url) {
    var winLeft = (screen.width - 640)/2;
    var winTop = (screen.height - 540)/2;
    var dialog = window.open(url, "dialog", "menubar=no,toolbar=no,scrollbars=yes,resizable=yes,status=no,width=640,height=480,left="+winLeft+",top="+winTop);
    dialog.focus();
}

function openHelp(context) {
    var winLeft = (screen.width - 800)/2;
    var winTop = (screen.height - 700)/2;
    var child = window.open("help.jsp?context="+context, "help", "menubar=no,toolbar=no,scrollbars=yes,resizable=yes,status=no,width=800,height=600,left="+winLeft+",top="+winTop);
    child.focus();
}

function openContent(page) {
    var winLeft = (screen.width - 800)/2;
    var winTop = (screen.height - 700)/2;
    var child = window.open(page, "content", "menubar=no,toolbar=yes,scrollbars=yes,resizable=yes,status=no,width=800,height=600,left="+winLeft+",top="+winTop);
    child.focus();
}

function updateCheckbox() {
    var checkAll = document.getElementById("checkAll");
    if (checkAll != null) {
        var checkedFlag = true;
        var list = document.getElementsByTagName("input");
        if (list != null) {
            for (var i=0; checkedFlag && i<list.length; i++) {
                if (list.item(i).type == "checkbox") {
                    if (list.item(i).id != "checkAll") {
                        checkedFlag = list.item(i).checked;
                    }
                }
            }
        }
        checkAll.checked = checkedFlag;
    }
}

function updateCheckboxes(chkbx) {
    var list = document.getElementsByTagName("input");
    if (list != null) {
        for (var i=0; i<list.length; i++) {
            if (list.item(i).type == "checkbox") {
                if (list.item(i).id != "checkAll") {
                    list.item(i).checked = chkbx.checked;
                }
            }
        }
    }
}

function funcname(f) {
    var s = f.toString().match(/function (\w*)/)[1];
    if ((s == null) || (s.length==0)) return "anonymous";
    return s;
}

function stacktrace() {
    var s = "";
    for (var a = arguments.caller; a !=null; a = a.caller) {
        s += ">"+funcname(a.callee) + "; ";
        if (a.caller == a) {s+="*"; break;}
    }
    return s;
}

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

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

function MM_findObj(n, d) { //v4.01
  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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

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

function getCookie(name) {
    name += "=";
    var nlen = name.length;
    var cookie = document.cookie;
    var clen = cookie.length;
    var i = 0;
    while (i < clen) {
        var j = i+nlen;
        if (cookie.substring(i, j) == name) {
            var endIndex = cookie.indexOf(";", j);
            if (endIndex == -1) endIndex = cookie.length;
            return cookie.substring(j, endIndex);
        }
        i = cookie.indexOf(" ", i)+1;
        if (i == 0) break;
    }
    return null;
}