var checkedElements = new Array();
var markedElements = new Array();
var can_change=true;

showInfoElement=function(id){
	can_change=false;
	var elements = document.getElementsByClassName("hide_short_desc");
	for(var i=0; i<elements.length; i++){
		elements[i].hide();
	}
	$('hide_short_desc_'+id).show();

	var elements = document.getElementsByClassName("hide_slideshow");
	for(var i=0; i<elements.length; i++){
		elements[i].hide();
	}
	$('hide_slideshow_'+id).show();
}

showInfoElement2=function(id){
	var elements = document.getElementsByClassName("hide_short_desc");
	for(var i=0; i<elements.length; i++){
		elements[i].hide();
	}
	$('hide_short_desc_'+id).show();

	var elements = document.getElementsByClassName("hide_slideshow");
	for(var i=0; i<elements.length; i++){
		elements[i].hide();
	}
	$('hide_slideshow_'+id).show();
}

markElement=function(mark_id){
	
	if(checkMarkedElements(mark_id)==1){
		markedElements.push(mark_id);
		$('mark_'+mark_id).show();
		$('unmark_'+mark_id).hide();
	}else{
		var pos = markedElements.indexOf(mark_id);
		removed = markedElements.splice(pos, 1);
		$('mark_'+mark_id).hide();
		$('unmark_'+mark_id).show();
	}
	
	$('marked_count').innerHTML=markedElements.length;
}

checkMarkedElements=function(id){
	var ret = 1;
	for(var i=0; i<markedElements.length; i++){
		if(markedElements[i]==id) ret = 0;
	}
	return ret;
}



slideshowElements=function(){
	var ids = new Array(1,2,3,4,5,6,7,8,9,10);
	var num = ids[randomNumber(ids.length-1)];
	if(can_change)showInfoElement2(num);
	setTimeout("slideshowElements()", 10000);
}

startSlideshowElements=function(){
	var ids = new Array(1,2,3,4,5,6,7,8,9,10);
	setTimeout("slideshowElements()", 10000);
}

randomNumber=function(num) {
   return Math.floor(Math.random()*(num+1));
}