function ShowHideContent(spoiler, blocktext) 
{
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    {
        spoiler.style.display = 'none';
        blocktext.src = 'http://www.devart.com/blogs/dotconnect/wp-content/uploads/2010/04/plus.jpg';
    }
    else 
    {
        spoiler.style.display = 'block';
        blocktext.src = 'http://www.devart.com/blogs/dotconnect/wp-content/uploads/2010/04/minus.jpg';
    }
 
}