window.onload = function()
{
    var headerTable = document.getElementById("headerTable");
    var footerTable = document.getElementById("footerTable");
    
    if (headerTable != null)
        headerTable.style.width = window.screen.availWidth - 22;            
        
    if (footerTable != null)
        footerTable.style.width = window.screen.availWidth - 22;
}