var backImage = new Array(); 
		backImage[1] = "./themes/bg/starplant.jpg";
		backImage[2] = "./themes/bg/postbox.jpg";
		
		function rand ( n )
		{
		    return ( Math.floor ( Math.random ( ) * n + 1 ) );
		}
		
		
		function changeBGImage()
		{
		    document.getElementById("lebody").style.backgroundImage = "url("+ backImage[rand(2)] +")";
		}