function main_onLoad()
{
    if (window.page_onLoad) page_onLoad();
}

function $(s) { return document.getElementById( s ); }

function avoidTransparentPNGsWhereNotSupported()
{
    // Take action in IE<7 and all Safari versions
    if ( ( navigator.userAgent.search( /MSIE [456]/ ) != -1 ) || ( navigator.userAgent.search( "Safari" ) != -1 ) )
    {
        $("dropShadowS").style.visibility = "hidden";
        $("dropShadowE").style.visibility = "hidden";
        $("dropShadowSE").style.visibility = "hidden";
        $("dropShadowSW").style.visibility = "hidden";
        $("dropShadowNE").style.visibility = "hidden";
    }
}