var current_slide = 1;		

var slides_counter='';
var max_num = 6;
var timeout = 5000;

function start_sliders_interval(tm){
	timeout = tm;
	if(slides_counter==''){
		slides_counter=window.setInterval('rotate_slides()',timeout);
	}
}

function stop_sliders_interval(){
	if(slides_counter!=''){
		window.clearInterval(slides_counter);
		slides_counter='';
	}
}
function call_slides(slide_num){	
	var n = 1;
	while(n<=max_num){
		if(slide_num == n){		
			document.getElementById('slide'+n).style.display = 'block';
			current_slide = slide_num;
		}
		else {
			document.getElementById('slide'+n).style.display = 'none';
		}
		n++
	}	
}

function call_next(){
	current_slide = current_slide + 1;
	if(current_slide > max_num) current_slide = 1;			
	call_slides(current_slide);

}

function call_prev(){
	current_slide = current_slide - 1;
	if(current_slide < 1) current_slide = max_num;			
	call_slides(current_slide);
}


function rotate_slides() {
	current_slide = current_slide + 1;
	if(current_slide > max_num) current_slide = 1;			
	call_slides(current_slide);
}