function orient() {  
       		switch(window.orientation){    
               case 0: document.getElementById("orient_css").href = "stylesheets/iphone_portrait.css";  
               break;  
     
               case -90: document.getElementById("orient_css").href = "stylesheets/iphone_landscape.css";  
               break;  
                
               case 90: document.getElementById("orient_css").href = "stylesheets/iphone_landscape.css";  
               break;  
    		}
   		}
   		 window.onorientationchange = orient();