var current_id = document.getElementById();

function ret(id){
    if(current_id == id){
        current_id = id;
        return true;
    }
    else{
        current_id = id;
        return false;
    }
    
}

function showPlayer(player){
    
    for(i=0; i<4; i++){
        if(i != 0)  document.getElementById('okno'+i).style.display = "none";
        else  document.getElementById('okno').style.display = "none";
    }
    
    if(player != 0)  document.getElementById('okno'+player).style.display = "block";
    else    document.getElementById('okno').style.display = "block";
    
    return false;
    
}

function dynamicChangebox(id){
    
    showPlayer(0);
    
    if(!id) id = 'it1';
    
    var i = 1;
    
    for(i=1;i<10;i++){
        var obj = document.getElementById('it'+i);
        var obj_check = 'it'+i;
        var ending = "";
        
        if(i == 3 || i == 6 || i == 9)  ending = "noborder";
        
        if(id == obj_check){
            
            if(obj) obj.className = "sel " + ending;
            
            if(obj){
            
                rel = obj.rel;
                rel = rel.split(';');
                id_file = rel[0];
                price = rel[1];
                type = rel[2];
            }
            
            showImage(id_file,price,type);
        }
        else{
            if(obj) obj.className = "" + ending;
        }
        
        
        
    }
    
    return false;
    
}

function autoswitchChangebox(arg, stop){
        
        var b2;
        
        for(i=1;i<10;i++){
            var obj = document.getElementById('it'+i);
            if(obj)    var max = i;
        }
        
        if(arg)
        {
            if(isInteger(arg) == true) var b = arg;
            else var b = 2;
        }
        
        if(arg > max){
            var b = 1;
        }
        
        if(!arg)
        {
            var b = 2;
        }
        
        if(stop){        
            timer = clearTimeout(timer);
        }
        
        
        
        if(document.getElementById('it'+b))        b2 = b+1;
        else{
            do{
                var obj = document.getElementById('it'+b);
                b++;
                b2 = b+1;
            }
            while(obj);
        }
        
        if(!stop)   timer = setTimeout('dynamicChangebox("it' + b + '"); autoswitchChangebox(' + b2 + ');', 10000);
        
    return false;
}

function isUnsignedInteger(s) {
    return (s.toString().search(/^[0-9]+$/) == 0);
}

function isInteger(s) {
    return (s.toString().search(/^-?[0-9]+$/) == 0);
}