// pagetop
function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 25);
  }
}

var name = "#pagetop";
var menuYloc = null;
$(function(){
	menuYloc = parseInt($(name).css("top").substring(0,$(name).css("top").indexOf("px")))
	$(window).scroll(function () { 
		offset = menuYloc+$(document).scrollTop()+"px";
		$(name).animate({top:offset},{duration:500,queue:false});
	});
}); 

//rollover
jQuery.fn.rollover = function(suffix) {
	suffix = suffix || '_on';
	return this.not('[src*="'+ suffix +'."]').each(function() {
		var img = jQuery(this);
		var src = img.attr('src');
		var _on = [
			src.substr(0, src.lastIndexOf('.')),
			src.substring(src.lastIndexOf('.'))
		].join(suffix);
		jQuery('<img>').attr('src', _on);
		img.hover(
			function() { img.attr('src', _on); },
			function() { img.attr('src', src); }
		);
	});
};
$(document).ready(function () {	
	$('img.rollover').rollover('_on'); 
});

//tr stripe
$(document).ready(function () {	
	$("table.stripe tr:even").addClass("even");
});