$(document).ready(function() {
  $("a.editBtn").hover(function(){

$(this).parents("div.preview").css("border","1px solid #f00");
},function(){
$(this).parents("div.preview").css("border","1px dotted #f00");
});
});

function changePic(url,caption) {
 $("p.mainpic img").attr("src",url);
 $("div.caption p").html(caption);
}