var numberColonne1Open = 0;
var numberColonne2Open = 0;
var numberColonne3Open = 0;
var numberColonne4Open = 0;
function blockOpenClose(colonne, number)
{
	var detail = document.getElementById("block_detail"+number);
	var fleche = document.getElementById("block_fleche"+number);
	
	// fermer le div ouvert dans la même colonne
	if ((colonne == 'colonne1') && (number != numberColonne1Open))
	{
		if (numberColonne1Open != 0) {
		document.getElementById("block_detail"+numberColonne1Open).style.display='none';
		document.getElementById("block_fleche"+numberColonne1Open).className='block_fleche_closed';
		}
		// lequel est maintenant ouvert ?
		numberColonne1Open = number
	}
	if ((colonne == 'colonne2') && (number != numberColonne2Open))
	{
		if (numberColonne2Open != 0) {
		document.getElementById("block_detail"+numberColonne2Open).style.display='none';
		document.getElementById("block_fleche"+numberColonne2Open).className ='block_fleche_closed';
		}
		// lequel est maintenant ouvert ?
		numberColonne2Open = number;
	}
	if ((colonne == 'colonne3') && (number != numberColonne3Open))
	{
		if (numberColonne3Open != 0) {
		document.getElementById("block_detail"+numberColonne3Open).style.display='none';
		document.getElementById("block_fleche"+numberColonne3Open).className ='block_fleche_closed';
		}
		// lequel est maintenant ouvert ?
		numberColonne3Open = number;
	}
	if ((colonne == 'colonne4') && (number != numberColonne4Open))
	{
		if (numberColonne4Open != 0) {
		document.getElementById("block_detail"+numberColonne4Open).style.display='none';
		document.getElementById("block_fleche"+numberColonne4Open).className ='block_fleche_closed';
		}
		// lequel est maintenant ouvert ?
		numberColonne4Open = number;
	}
	
	// ouvrir le div sur lequel on a cliqué
	/*fleche.src=(detail.style.display == 'block')?'images/fleche_open.png':'images/fleche_close.png';
	detail.style.display=(detail.style.display == 'block')?'none':'block';*/
	fleche.className ='block_fleche_opened';
	detail.style.display='block';
	
	//alert('col1:'+numberColonne1Open+' _ col2:'+numberColonne2Open);
}