// JavaScript Document
function ajax_lnk() {
  //alert(navigator.userAgent);
 
  
  $$('.ajax_content a').each(function(elem) {
	   elem.onclick = function(event){
			var nav_str = navigator.userAgent;
			 $$('.ajax_content a').each(function(elem) { elem.removeClassName('selected'); });
			var trselem = this.rel;
			if(trselem != '')
			{
				this.addClassName('selected');
				$('content_principal').update('<div id="loader"><img src="foto/loading.gif" alt="load"/></div>');
				new Ajax.Updater('content_principal', 'get_content.php?pg='+trselem, { method: 'get' });
			}
			if(nav_str.include('MSIE 6.0;'))
			{
				return false; // in ie 6 nu merge eventstop !?
			} else {
				event.stop();
			}
	   }
  });

};