$(document).ready(function(){
  
  function endArrow(e) {
  if ($(e).attr("style")) { $(e).removeAttr("style"); }
    else { $(e).css("background-image","url(/Images/newsite/accordian_button_down.jpg)"); }     
  }
  
  $(".accordian_content_1, .accordian_content_2, .accordian_content_3, .accordian_content_4").hide();
  $(".accordian_content_1").show();
  $(".accordian_1").css("background-image","url(/Images/newsite/accordian_button_down.jpg)");
  
  $(".accordian_1").click(function () { $(".accordian_content_1").slideToggle("fast"); endArrow(this); }); 
  $(".accordian_2").click(function () { $(".accordian_content_2").slideToggle("fast"); endArrow(this); });
  $(".accordian_3").click(function () { $(".accordian_content_3").slideToggle("fast"); endArrow(this); });
  $(".accordian_4").click(function () { $(".accordian_content_4").slideToggle("fast"); endArrow(this); });

});