function backgroundFilter()
{
    var div;
    
    if(document.getElementById)
    // Standard way to get element
    div = document.getElementById('backgroundFilter'); 
    else if(document.all) 
    // Get the element in old IE's 
    div = document.all['backgroundFilter']; 
    
    // if the style.display value is blank we try to check it out here 
    if(div.style.display==''&&div.offsetWidth!=undefined&&div.offsetHeight!=undefined)
    {
        div.style.display = (div.offsetWidth!=0&&div.offsetHeight!=0)?'block':'none'; 
    }
    
    // If the background is hidden ('none') then it will display it ('block').
    // If the background is displayed ('block') then it will hide it ('none').
    div.style.display = (div.style.display==''||div.style.display=='block')?'none':'block';
}

function popUp()
{
    var div;
    
    if(document.getElementById)
    // Standard way to get element
    div = document.getElementById('popupWindow'); 
    else if(document.all) 
    // Get the element in old IE's 
    div = document.all['popupWindow']; 

    // if the style.display value is blank we try to check it out here 
    if(div.style.display==''&&div.offsetWidth!=undefined&&div.offsetHeight!=undefined)
    {
        div.style.display = (div.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none'; 
    }
    
    // If the PopUp is hidden ('none') then it will display it ('block').
    // If the PopUp is displayed ('block') then it will hide it ('none').
    div.style.display = (div.style.display==''||div.style.display=='block')?'none':'block';
}

function popupVideo()
{
    var div;
    
    if(document.getElementById)
    // Standard way to get element
    div = document.getElementById('popupVideo'); 
    else if(document.all) 
    // Get the element in old IE's 
    div = document.all['popupVideo']; 

    // if the style.display value is blank we try to check it out here 
    if(div.style.display==''&&div.offsetWidth!=undefined&&div.offsetHeight!=undefined)
    {
        div.style.display = (div.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none'; 
    }
    
    // If the PopUp is hidden ('none') then it will display it ('block').
    // If the PopUp is displayed ('block') then it will hide it ('none').
    div.style.display = (div.style.display==''||div.style.display=='block')?'none':'block';
}