var Emuseum = {
	openPopup: function(url) {
		window.open(url,null,"height=700,width=700,scrollbars=0,resizable=1,menubar=0,toolbar=0,status=0,location=0,directories=0,left=150,top=100");
		return false;
	},
	
	stripPrefix: function(prefix, str) {
		return str.startsWith(prefix) ? str.substring(prefix.length) : str;
	},
	
	/**
     * Execute onclick event on space-button pressed. 
     */
    onkeypressExecuteOnclick: function(event, elem) {
        var keynum;
		var keychar;
		
		if(window.event) // IE
		  {
		  keynum = event.keyCode;
		  }
		else if(event.which) // Netscape/Firefox/Opera
		  {
		  keynum = event.which;
		  }
		
		// If space-button was pressed then execute select function.
		keychar = String.fromCharCode(keynum);
		if (keychar == ' ')
		  {
		  elem.onclick(event);	
		  }
    },	
    
	/**
	 * Select single checkbox.
	 */
	select: function(elem, url) {
		var allselected = true;
		$$('.selection').each(function(item) {
			if(!item.checked) {
				allselected = false;
			}
		});
		if(typeof applySelectAllOnPageCBSelection != 'undefined') {
		  applySelectAllOnPageCBSelection(allselected);
		}
		this.selectAjax(elem.checked, url, [elem]);
	},
	
	/**
	 * Calls when administrator select an object for role assign/remove.
	 * @param items - either single item id, or an array of items identifiers.
	 */
	selectAjax: function(checked, url, items) {
		if(url && url != 'null') {
		    var idsJoined = "-1";
		    if(items) {
				var ids = items.collect(function(item) {
			    	return Emuseum.stripPrefix('selection:', item.id);
			    });
			    idsJoined = ids.join('/');
			}
		    new Ajax.Request(url.replace("_id", idsJoined).replace("_state", checked),
	    		{ asynchronous: false });
		}
	},

	setFocus: function(page){
		if(page=='search/Quick'){
			$('searchQueryField').activate();
		}
		if(page=='Login'){
			$('j_username').activate();
		}
		if(page=='PasswordRecovery'){
			$('email').activate();
		}	
		if(page=='Registration'){
			$('firstName').activate();
		}		
	}
	
}