function showText(id, text){
	if(!text){
		text = ' ';
		document.getElementById('image_' + id).className='prv_link';
	}else{
		document.getElementById('image_' + id).className='prv_link_hover';
	}
	document.getElementById(id).innerHTML = text;
}

function showCells(side){
	var i;
	var id;
	if(side == 'left' && start > 1){
		start--;
	}else if(side == 'right' && (quant - start - onPage) >= 0){
		start++
	}
	for(i = 1;i<=quant;i++){
		id = 'cell_' + i;
		if(i >= start && i < start + onPage){
			document.getElementById(id).style.display = 'block';
		}else{
			document.getElementById(id).style.display = 'none';
		}
	}

//	var nav_l_id = start > 1 ? 'nav_left' : 'nav_left_empty';
//	var nav_r_id = (quant - start - onPage ) >= 0 ? 'nav_right' : 'nav_right_empty';

	if(start > 1){
		document.getElementById('nav_left').style.display = 'block';
		document.getElementById('nav_left_empty').style.display = 'none';
	}else{
		document.getElementById('nav_left').style.display = 'none';
		document.getElementById('nav_left_empty').style.display = 'block';
	}

	if((quant - start - onPage) >= 0){
		document.getElementById('nav_right').style.display = 'block';
		document.getElementById('nav_right_empty').style.display = 'none';
	}else{
		document.getElementById('nav_right').style.display = 'none';
		document.getElementById('nav_right_empty').style.display = 'block';
	}

}