/*load backgroundimage*/
function initbackground(imagebg){

  var nombre_imagebgs = 10;
	var nombre_alleatoire = Math.random();
	var numero = Math.round( ( nombre_imagebgs - 1 ) * nombre_alleatoire ) + 1;

	imagebgs = new Array;


 imagebgs[1] = 'homebg01.jpg';  
 imagebgs[2] = 'homebg02.jpg';  
 imagebgs[3] = 'homebg03.jpg';  
 imagebgs[4] = 'homebg04.jpg';  
 imagebgs[5] = 'homebg05.jpg';  
 imagebgs[6] = 'homebg06.jpg';  
 imagebgs[7] = 'homebg07.jpg';  
 imagebgs[8] = 'homebg08.jpg';  
 imagebgs[9] = 'homebg09.jpg';  
 imagebgs[10] = 'homebg10.jpg';  
 var imagebg = imagebgs[numero];
 
 


	if (imagebg == undefined) { imagebg=''; }

	if (document.body){
	
		url = "http://www.pierremorel.net/home/imgsize.php?w=" + pageWidth() + "&img=" + imagebg;  

		document.body.background = url;
		
	}
}

///define pagewidth & height for determining size backgroundimage
function pageWidth() {return window.innerWidth != null? window.innerWidth: document.documentElement && document.documentElement.clientWidth ? document.documentElement.clientWidth:document.body != null? document.body.clientWidth:null;}
function pageHeight() {return window.innerHeight != null? window.innerHeight: document.documentElement && document.documentElement.clientHeight ? document.documentElement.clientHeight:document.body != null? document.body.clientHeight:null;}