function affiche_bloc(bloc_complet,bloc_petit){
	document.getElementById(bloc_petit).style.display='none';
	document.getElementById(bloc_complet).style.display='block';
}

function cache_bloc(bloc_complet,bloc_petit){
	document.getElementById(bloc_complet).style.display='none';
	document.getElementById(bloc_petit).style.display='block';
}

function VerifForm_mail(form,champ){
	adresse = champ.value;
	var place = adresse.indexOf("@",1);
	var point = adresse.indexOf(".",place+1);
	if ((place > -1)&&(adresse.length >2)&&(point > 1))
		return true;
	else{
		alert('Entrez une adresse e-mail valide !');
		return false;
	}	
}

function MM_openBrWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}

function voir_image(image,width,height){
	window.open("apercu_image.php?image=" + image + "&width=" + width + "&height=" + height , "", "width=" + width + ",height=" + height + ",scrollbar=no");
}

function voir_gallerie(id){
	window.open("apercu_gallerie.php?id=" + id , "", "width=600,height=500,scrollbars=yes");
}

var win=null;
function openfenetre(mypage,myname,w,h,scroll,pos){
	if(pos=="random"){LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
	if(pos=="center"){LeftPosition=(screen.width)?(screen.width-w)/2:100;TopPosition=(screen.height)?(screen.height-h)/2:100;}
	else if((pos!="center" && pos!="random") || pos==null){LeftPosition=0;TopPosition=20}
	settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
	win=window.open(mypage,myname,settings);
}