function setImageBg(ville,va,winSize){

// get window's size
var myWidth = 1008, myHeight = 666;
if( typeof( window.innerWidth ) == 'number' ) {
	//Non-IE
	myWidth = window.innerWidth;
	myHeight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
	//IE 6+ in 'standards compliant mode'
	myWidth = document.documentElement.clientWidth;
	myHeight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
	//IE 4 compatible
	myWidth = document.body.clientWidth;
	myHeight = document.body.clientHeight;
}

// define image format
if(myWidth > winSize) {
	// locate bg image
	if (va) {
	
		var urlImageBg = "http://blogs.ionis-group.com/iseg/fichiers-templates/images/design/bg/"+ville+"/va/photo-background-1600.jpg";
	
	}
	
	else {
	
		if (ville == "")
			var urlImageBg = "http://blogs.ionis-group.com/iseg/fichiers-templates/images/design/bg/photo-background-1600.jpg";
		else
			var urlImageBg = "http://blogs.ionis-group.com/iseg/fichiers-templates/images/design/bg/"+ville+"/photo-background-1600.jpg";
			
	}
	 
	 // set background
	document.getElementById("Contener").style.backgroundImage = "url('"+urlImageBg+"')";
}
//exception bg video
if(typeof(CONST_VIDEO_BG)!='undefined')
	document.getElementById("Contener").style.background = "none";

}