function activateMode( mode )
{
    var tmp_form= document.createElement( 'form' );
    var mode_input= document.createElement( 'input' );
    mode_input.type= "hidden";
    mode_input.value= mode;
    mode_input.name= 'portalmode';
    tmp_form.appendChild( mode_input );
    document.body.appendChild( tmp_form );
    tmp_form.method= "post";
    tmp_form.submit();
}





function initModeSwitchButtonHelper()
{
    var summer= document.getElementById( 'summerSwitch' );
    var winter= document.getElementById( 'winterSwitch' );

    if( summer )
    {
        addPortableEventListener( summer, 'click', function(){ activateMode( 'summer' ); } );
        addPortableEventListener( winter, 'click', function(){ activateMode( 'winter' ); } );

        summer.href= "javascript:void(0)";
        winter.href= "javascript:void(0)";
    }
}







runOnLoad( initModeSwitchButtonHelper );