function layerShowHide(id, show, ret) {

if ( !show ) {
state = 'none';
}
else {
state = 'block';
} 

    if(document.layers)	   //NN4+
    {
       document.layers[id].visibility = show ? "show" : "hide";
       document.layers[id].display = state; 
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(id);
        obj.style.visibility = show ? "visible" : "hidden";
        obj.style.display = state;
    }
    else if(document.all)	// IE 4
    {
        document.all[id].style.visibility = show ? "visible" : "hidden";
        eval( "document.all." + id + ".style.display = state"); 
    }
    if( ret != 'undefined') return ret;
}


function resetRadio(name) {                                                                                                                                          
    document.getElementById(name+'__1').checked=false;                                                                                                                   
    document.getElementById(name+'__2').checked=false;                                                                                                                   
}

function setStyle(id,style) {                                                                                                                                          
    document.getElementById('download').className='';
    document.getElementById('faq').className='';
    document.getElementById('news').className='';
    document.getElementById('announce').className='';
    document.getElementById(id).className=style;
}