function ShowEmailForm(imageId)
{    
    if(imageId == -1)
    {
        $('#emailform"').css('display', 'none');
    }
    else    
    {
        //document.getElementById("ctl00_CpMain_HfImageId").value = imageId;
        $('#imageid input"').val(imageId);
        $('#emailform"').fadeIn('fast');

        //document.getElementById("emailform").style.display = "block";
    }
}

function ShowHideThumb(id)
{
    var img = document.getElementById(id);    
    if(img.style.display == "block")
        img.style.display = "none";
    else img.style.display = "block";    
}

function ClearValue(element, value)
{
    if(element.value == value)
        element.value = "";
}

function ReplaceValue(element, value)
{
    if(element.value.length == 0)
        element.value = value;
}

function ShowHideResolutions()
{
    var div = document.getElementById('resolutionsexplained');
    if(div.style.display == "block")
        div.style.display = "none";
    else div.style.display = "block";    
}