var currentLocation = 0;

function getImgs(cName) {
    var ektronBlock = document.getElementById('ehc_Videos');
    var spryBlock = document.getElementById('spryGroup');
    
    var ektronContent = ektronBlock.innerHTML;
    ektronBlock.style.display = 'none';
    spryBlock.innerHTML = ektronContent;
    spry.showNextPanel();
}

function getLocation(direction) {
    var spryPrev = document.getElementById('spryNav_P');
    var spryNext = document.getElementById('spryNav_N');
    
    var spryBlock = document.getElementById('spryGroup');
    var spryLocation = spryBlock.getAttribute('style');
    
    if (typeof spryLocation == 'string')
        spryLocation = spryLocation;
    else if (typeof spryLocation == 'object')
        spryLocation = spryLocation.cssText;
        
    currentLocation = getLocationNumeric('LEFT', spryLocation);
    var endOfFile = getEndOfFile();
    
    if (direction == 'p' && currentLocation < 312)
        spryPrev.style.display = 'none';
    else
        spryPrev.style.display = 'block';

    if (direction == null)
        spryPrev.style.display = 'none';
        spryNext.style.display = 'none';
        
    if (direction == 'n' && (endOfFile - currentLocation) < 312)
        spryNext.style.display = 'none';
    else if (endOfFile <= 5)
        spryNext.style.display = 'none';
    else
        spryNext.style.display = 'block';
}

function getEndOfFile() {
    var spryBlock = document.getElementById('spryGroup');
    
    var totalVids = spryBlock.getElementsByTagName('img');
    var endOfFile = (totalVids.length * 156) - (4 * 156) + 5;
    
    return endOfFile;
}

function getLocationNumeric(spryVar, spryStr) {
    var vars = spryStr.split("px;"); 
    for (var i=0;i<vars.length;i++) { 
        var pair = vars[i].split(": -"); 
        if (pair[0] == spryVar) { 
            return pair[1]; 
        } 
    } 
}