$(function() {
		function windowH(){
			if (window.innerHeight) return window.innerHeight  ;
			else{return $(window).height();}
		}
		function windowW(){
			if (window.innerWidth) return window.innerWidth  ;
			else{return $(window).width();}
		}
			
		function chooseBackground(){
			largeur = windowW();
			hauteur = windowH();
	  	 	if(largeur <= 800){
	   	 		fond="800600";
	   	 		//document.write("<style>body { margin:0; font-family:Georgia, Verdana, sans serif; color:#fff; background:url(pix/fonds/800600.jpg) fixed no-repeat 0 0;}</style>");
	    	}
	    	else if(largeur <= 1024  && largeur > 800){
	    		fond="1024768";
	    	}
	    	else if(largeur <= 1280 &&  hauteur <= 800){
	    		fond="1280800";
	    	}	  		
	    	else if(largeur <= 1440 &&  hauteur <= 800){
	    		fond="1440900";
	    	}
	    	else{
	    		fond="16801280";
	    	}	  	
	    	if($("body").css("background-image")!="url("+base_url+"img/fonds/"+fond+".jpg)"){	
	  			$("body").css("background-image","url("+base_url+"img/fonds/"+fond+".jpg)");
	  		}
		}
		$(window).resize(chooseBackground);

		chooseBackground();
});