function menuSlide(menu_item){
    var st;    
    if(menu_item==1){
        $('#project_results_sub').slideUp('fast');
        $('#related_info_sub').slideUp('fast');
        if($('#project_info_sub').css('display')=='none')
            $('#project_info_sub').slideDown('fast');
        else $('#project_info_sub').slideUp('fast');        
    }
    else if(menu_item==11){
        if($('#project_info_sub_sub').css('display')=='none')
            $('#project_info_sub_sub').slideDown('fast');
        else $('#project_info_sub_sub').slideUp('fast');        
        
    }
    else if(menu_item==2){
        $('#project_info_sub').slideUp('fast');
        $('#related_info_sub').slideUp('fast');
        if($('#project_results_sub').css('display')=='none')
            $('#project_results_sub').slideDown('fast');
        else $('#project_results_sub').slideUp('fast');        
    }
    else if(menu_item==4){
        $('#project_info_sub').slideUp('fast');
        $('#project_results_sub').slideUp('fast');        
        if($('#related_info_sub').css('display')=='none')
            $('#related_info_sub').slideDown('fast');
        else $('#related_info_sub').slideUp('fast');        
    }
    
}