var SRO={};
SRO.banner=function(){
	var sroServerScriptUrl = 'http://www.srovname.cz/bannerServer.php';
	return{
		requestData: function(action){
			// odmazeme stary skript, pokud existoval
			var bannerTarget = document.getElementById('sro-banner-target');
			if(!bannerTarget) alert('SRO banners system: Cilovy element nenalezen!');
			var htmlHead = document.getElementsByTagName('head')[0];
			var bannerLoader = document.getElementById('sro-banner-loader');
			// sestaveni url skriptu (nastaveni promennych)
			var script_path = sroServerScriptUrl + '?action='+action+'&r='+Math.random();
			if(bannerLoader){
				bannerLoader.src = script_path;
			}else{
				script = document.createElement('script');
				script.id = 'sro-banner-loader';
				script.src = script_path;
				htmlHead.appendChild(script); 
			}
			// Ihned po vlozeni prohlizec stahne skript a spusti jej
			return false;
		},
		outputData: function(html) {
			// nejsnazsi cesta, vlozime novy kod ke staremu na konec
			var bannerTarget = document.getElementById('sro-banner-target');
			if(!bannerTarget) alert('SRO banners system: Cilovy element nenalezen!');
			bannerTarget.innerHTML = html;
			return true;
		},
		outputError: function(txt) {
			// 	obycejny alert s hlaskou
			alert(txt);
			return true;
		},
		removeData: function() {
			// v jednoduchem cyklu smazeme vsechny elementy v prvku vystup
			while(vystup.hasChildNodes()) vystup.removeChild(vystup.childNodes[0]);
			return false;
		}
	}
}();
//SRO.banner.requestData('golias');