function centerSelf() {
    if (screen.width > 800) {
    	var w = 980;
//        	var h = 768;
    	var h = 850;
    	var x = (screen.width - w) / 2;
    	var y = (screen.height - h) / 2;
    	
    	//self.moveTo(x,y);
    	self.resizeTo(w,h);
  	}
  }


  function imageChange(str_to) {
    document.getElementById('body_slide').style.backgroundImage = 'url(images/body_slide_fg.jpg)';
    document.getElementById('body_slide').style.backgroundImage = 'url('+str_to+')';
    
    return true;
  }

  
  var obj_slide;      
  
  function slide_move (str_offset) {
//    if (parseInt (document.getElementById('body_listing_content').style.top) + parseInt (str_offset) <= '0') {
//      slide_end ();
//    }
  
//    if (str_offset < 0 && parseInt (document.getElementById('body_listing_content').offsetHeight) - 405 - (parseInt (document.getElementById('body_listing_content').style.top) * -1) <= 0) {
//      slide_end ();        
//    }        
    if (str_offset > 0 && parseInt (document.getElementById('body_listing_content').style.top) >= '0') {
      slide_end ();
    }
    
    else if (str_offset < 0 && parseInt (document.getElementById('body_listing_content').offsetHeight) - 500 - (parseInt (document.getElementById('body_listing_content').style.top) * -1) <= 0) {
      
      slide_end ();    
    }

    else {
      document.getElementById('body_listing_content').style.top = (parseInt (document.getElementById('body_listing_content').style.top) + parseInt (str_offset)) + 'px';
    }
    
    return true;
  }      
  
  function slide_start (str_offset) {
    obj_slide = setInterval ("slide_move('" + str_offset + "')", '40');
  }
  
  function slide_end () {
    clearInterval (obj_slide)
  }
  
  //centerSelf();