/* javascript */
function updateCart(id) {
	var url = 'cart.php';
	var params = 'action=update&id=' + id;
	var ajax = new Ajax.Updater(
		{success: 'ajax_resp'},
		url,
		{method: 'get', parameters: params});
	changeButton(id, 'update');
}

function delCart(id) {
	var url = 'cart.php';
	var params = 'action=delete&id=' + id;
	var ajax = new Ajax.Updater(
		{success: 'ajax_resp'},
		url,
		{method: 'get', parameters: params});
	changeButton(id, 'delete');	
}

function changeButton(id, myaction) {
	var imgname = 'img_' + id;
	var action = myaction;
	if (action == 'update') {
		document.images[imgname].src = 'gfx/btn_inmerkliste.png';
	} else {
		document.images[imgname].src = 'gfx/btn_merkliste.png';
	}
}

/* popup function
Usage: The link is written as follows: 
onclick="popwindow(this.href, 'popup', 600, 500, 1, 1, 0, 0, 0, 1, 0);

Usage Description:
"this.href" refers to the URL given in the "a" tag; "'popup'" is the name of the popup window;
600 is the width of the popup window; 500 is the height of the popup window; the numbers that
follow designate whether a property is turned on ("1") or off ("0"), in this order:
scrollbars, resizable, menubar, toolbar, addressbar, statusbar, fullscreen
*/

function popwindow(a_str_windowURL, a_str_windowName, a_int_windowWidth, a_int_windowHeight, a_bool_scrollbars, a_bool_resizable, a_bool_menubar, a_bool_toolbar, a_bool_addressbar, a_bool_statusbar, a_bool_fullscreen) {
	var int_windowLeft = (screen.width - a_int_windowWidth) / 2;
  	var int_windowTop = (screen.height - a_int_windowHeight) / 2;
  	var str_windowProperties = 'height=' + a_int_windowHeight + ',width=' + a_int_windowWidth + ',top=' + int_windowTop + ',left=' + int_windowLeft + ',scrollbars=' + a_bool_scrollbars + ',resizable=' + a_bool_resizable + ',menubar=' + a_bool_menubar + ',toolbar=' + a_bool_toolbar + ',location=' + a_bool_addressbar + ',statusbar=' + a_bool_statusbar + ',fullscreen=' + a_bool_fullscreen + '';
  	var obj_window = window.open(a_str_windowURL, a_str_windowName, str_windowProperties)
    if (parseInt(navigator.appVersion) >= 4) {
      obj_window.window.focus();
    }
}