function ImageHover(img)
{
    var source = img.src;
    
    if(source.indexOf("-off") > -1)
    {
        img.src = source.replace("-off","-hover");
    }
    else
    {
        img.src = source.replace("-hover","-off");
    }

}

function checkUncheckAll(box,field)
{
    if (box.checked == true)
    {
        for (i = 0; i < field.length; i++)
            field[i].checked = true ;
    }
    else
    {
        for (i = 0; i < field.length; i++)
            field[i].checked = false ;
    }
}

function ShowDiv( divToShow )
{
    var div = document.getElementById(divToShow);
    div.style.display = 'block';
}

function HideDiv( divToHide )
{
    var div = document.getElementById(divToHide);
    div.style.display = 'none';

}