function collapse(id) {
    _obj = document.getElementById(id) ; 
    if(!_obj)
        return false ;
    else {
        _obj.style.display = (_obj.style.display == '' || _obj.style.display == 'block')? 'none' : 'block' ;
    }
    return true ;
}

function switchMainMenu(id, tab) {
    tabs = ['','2','3','4'] ;
    for(i = 0; i < tabs.length; i++) {
        _elm = document.getElementById('mainMenuHeaderTD'+tabs[i]+'_'+id) ;
        if(_elm) _elm.className = 'mainMenuHeader2' ;
        _elm = document.getElementById('mainMenuHeaderTitle'+tabs[i]+'_'+id) ;
        if(_elm) _elm.className = 'mainMenuHeaderTitle2' ;
        _elm = document.getElementById('mainMenuContent'+tabs[i]+'_'+id) ;
        if(_elm) _elm.style.display = 'none' ; 
//        Effect.BlindUp('mainMenuContent'+tabs[i]+'_'+id);
//        _id = 'mainMenuContent'+tabs[i]+'_'+id ;
//        $(_id).hide() ;      
    }
    elm = document.getElementById('mainMenuHeaderTD'+tab+'_'+id) ;
    if(elm) elm.className = 'mainMenuHeader' ;
    elm = document.getElementById('mainMenuHeaderTitle'+tab+'_'+id) ;
    if(elm) elm.className = 'mainMenuHeaderTitle' ;
    elm = document.getElementById('mainMenuContent'+tab+'_'+id) ;
    if(elm) elm.style.display = 'block'; 
//    _id = 'mainMenuContent'+tab+'_'+id ;
//    $(_id).show() ;
//    Effect.BlindDown('mainMenuContent'+tab+'_'+id, { duration: 3.0 });
    return true ; 
}

function checkAllBoxes(names, value) {
	var i = 0;
	var box;
	do {
		box = document.getElementsByName(names)[i];
		i++;
		if(box) {
			box.checked = value;
		}
	} while(box);
}