$(document).ready(function()
{
    var imgId="";
    $('#prezentareElemente img').click(function()
    {
        if(imgId=="") imgId="prezentareE";
        var currentId = $(this).attr('id');

        if(imgId!=currentId)
        {
            var srcObj = document.getElementById(currentId).src;
            var srcObjC = document.getElementById(imgId).src;
            schimbaSrc(srcObj,currentId,"_");

            $('#'+currentId+'_').show();
            $('#'+imgId+'_').hide();

            schimbaSrc(srcObjC,imgId,".");
            srcObj=srcObjC;
            imgId=currentId;
        }
    });
});