function PopUp(ItemName){
    var PopUpItem = document.getElementById(ItemName);

    if(PopUpItem.currentStyle){
        if (PopUpItem.currentStyle.display == "none"){
            PopUpItem.style.display = "block"; 
     
        }
        else {
            PopUpItem.style.display = "none";                     
        }
    }
    if(window.getComputedStyle){
        if (window.getComputedStyle(PopUpItem, null).getPropertyValue("display") == "none"){
            PopUpItem.style.display = "block";                      
        }
        else {
            PopUpItem.style.display = "none";                  
        }
    }    
}