var cssType = "";
function setBackgrnd(){
  switch(screen.width){
    case 640:  document.body.background="../images/backgrnd/backgrndRed-640x480.jpg";
    	       setCssType("style640");
    	       break;
    case 800:  document.body.background="../images/backgrnd/backgrndRed-800x600.jpg";
    	       setCssType("style800");
    	       break;
    case 1024: document.body.background="../images/backgrnd/backgrndRed-1024x768.jpg";
    	       setCssType("style1024");
    	       break;
    case 1152: document.body.background="../images/backgrnd/backgrndRed-1152x864.jpg";
    	       setCssType("style1152");
    	       break;
    case 1280: document.body.background="../images/backgrnd/backgrndRed-1280x1024.jpg";
    	       setCssType("style1280");
    	       break;
    case 1600: document.body.background="../images/backgrnd/backgrndRed-1600x1200.jpg";
    	       setCssType("style1600");
    	       break;
    default  : document.body.background="../images/backgrnd/backgrndRed-1024x768.jpg";
    	       setCssType("style1024");
    	       break;
  }
  //<div id="Layer1" style="position:absolute; left:91px; top:19px; width:286px; height:129px; z-index:1"><img src="images/logo.gif" width="351" height="155"></div>
}

function getCssType(){
  return cssType;
}

function setCssType(ctype){
  cssType = ctype;
}