function popin(id,flag){
	
	var popin = document.getElementById(id);
	
	// On affiche la popin
	if(flag == 'o'){
		popin.style.display = 'block';
	}
	// On cache la popin
	else{
		popin.style.display = 'none';
		document.getElementById('popinLayer').style.display = 'none';
	}
}

function GetHeight() {
    var windowHeight=0;
    if (typeof(window.innerHeight)=='number') {
        windowHeight=window.innerHeight;
    }
    else {
     if (document.documentElement&&
       document.documentElement.clientHeight) {
         windowHeight = document.documentElement.clientHeight;
    }
    else {
     if (document.body&&document.body.clientHeight) {
         windowHeight=document.body.clientHeight;
      }
     }
    }
    return windowHeight;
}
/* Display gray layer */
function displayLayer(){
	document.getElementById("popinLayer").style.height = GetHeight()+'px';
	document.getElementById('popinLayer').style.display = 'block';
}