function updateURIField(src, trg) {

   if($(trg).value=="") {
      var title = $(src).value;

      
      title = title.toLowerCase();
      title = title.replace(new RegExp(/š/g),"s");
      title = title.replace(new RegExp(/ě/g),"e");
      title = title.replace(new RegExp(/í/g),"i");
      title = title.replace(new RegExp(/č/g),"c");
      title = title.replace(new RegExp(/ř/g),"r");
      title = title.replace(new RegExp(/ž/g),"z");
      title = title.replace(new RegExp(/ý/g),"y");
      title = title.replace(new RegExp(/á/g),"a");
      title = title.replace(new RegExp(/é/g),"e");
      title = title.replace(new RegExp(/ů/g),"u");
      title = title.replace(new RegExp(/ú/g),"u");
      title = title.replace(new RegExp(/ď/g),"d");
      title = title.replace(new RegExp(/ť/g),"t");
      title = title.replace(new RegExp(/ň/g),"n");

      title = title.replace(new RegExp(/[^a-z0-9-]/g)," ");
      title = title.replace(new RegExp(/\s+/g),"-");
      title = title.replace(new RegExp(/^\-+/),""); // START
      title = title.replace(new RegExp(/\-+$/),""); // END

      $(trg).value = title;
   }
}

var favVoted = '/imgs/fav.png';
var favWait = '/imgs/wait12.gif';
var favClear = '/imgs/votefav.png';

function fav(poID) {
    var curSrc = $('fav-'+poID).src;
    
    if(curSrc.endsWith(favWait)) {return;}
    else {$('fav-'+poID).src = favWait;}
    if(curSrc.endsWith(favVoted)) {
       unfav(poID);
       return;
    }

	$('fav-'+poID).src = favWait;
	var url = '/post/votefav/poID/' + poID;

	new Ajax.Request(url, {
  		method: 'get',
  		onSuccess: function(transport) {
    		var fav = $('fav-'+poID);
    		fav.src = favVoted;
    	},
    	onFailure: function(transport) {
    		$('fav-'+poID).src = favClear;
    	}
	});
}

function unfav(poID) {
	var url = '/post/unfav/poID/' + poID;

	new Ajax.Request(url, {
  		method: 'get',
  		onSuccess: function(transport) {
    		$('fav-'+poID).src = favClear;
    	},
    	onFailure: function(transport) {
    		$('fav-'+poID).src = favVoted;
    	}
	});
}


var stopCheckNewSince = false;

function startCheckNewSince() {
   new PeriodicalExecuter(function(pe) {
      if (stopCheckNewSince)
      pe.stop();
      checkNewSince();
   }, 20);
}

function stopCheckNewSince() {
   stopCheckNewSince = true;
}

function checkNewSince() {
   var url = '/api/newsince/?datetime=2010-03-11+18%3A21%3A04';
   new Ajax.Request(url, {
      method: 'get',
      onSuccess: function(transport) {
         var re = transport.responseText;
         if(re!='') {
            $('newSince').setStyle({visibility:'visible'});
            $('newSince').innerHTML = re;
         }
      },
      onFailure: function(transport) {
         
      }
   });
}
var lastVideoContent = null;
var lastVideoID = null;

function playVideo(id, vid) {
   if(lastVideoID!=null) {
      $('post-'+lastVideoID).innerHTML = lastVideoContent;
   }

   embed = '<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/'+vid+'&amp;hl=en"></param>';
   embed += '<param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/'+vid+'&amp;hl=en" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>';
   
   lastVideoID = id;
   lastVideoContent = $('post-'+id).innerHTML;
   $('post-'+id).innerHTML = embed;
   return false;
}