/* Открытие невидимых блоков */
function openBlock(idBlock){
	
	var objBlock=document.getElementById(idBlock);
	
	if(objBlock.style.display == 'none'){
		objBlock.style.display = 'block';
		document.getElementById('open_'+idBlock).style.display = 'none';
		document.getElementById('close_'+idBlock).style.display = 'block';
	}
	else {
		objBlock.style.display = 'none';
		document.getElementById('open_'+idBlock).style.display = 'block';
		document.getElementById('close_'+idBlock).style.display = 'none';		
	}	
	
}