/* -------------------------------------------------------------------------- */
/*    
 *    JavaScript Document
 *
 *    Copyright(C) Design with me.
 *
 *    2011-07-29.
 */
/* -------------------------------------------------------------------------- */

$(function() {
if($.os.name !== 'iphone' && $.os.name !== 'ipod' && $.os.name !== 'ipad') {

var totop = $('#to_top');
var totop_w = 23;
var foot_h = $('#footer').height();

$(window).scroll(function () {
		var doc_h = document.body.offsetHeight;
  var window_h = $(window).height();
		var window_w = $(window).width();
  var window_sctop = $(window).scrollTop();
  var totop_h = doc_h -  foot_h;
  var scroll_h = window_sctop + window_h;
		var pos_l =  (window_w / 2) - totop_w;
		
		if(window_sctop === 0) {
			totop.hide();
		} else {
		 totop.show();
		}
		
  if(scroll_h < totop_h) {
    totop.addClass('fixed').css('left', pos_l + 'px');
  } else {
    totop.removeClass('fixed').css('left', '0');
  }
});

}


});