var utils = new (function () {
	this.doInitialFieldClear = function (field) {
		with (field) {
			value = "";
			onfocus = function () {};
		}
	}

	this.openCenteredWindow = function (link, width, height, scrollbars, resizable) {
		scrollbars = "scrollbars=" + (scrollbars == "scrollbars" ? "1" : "0");
		resizable = "resizable=" + (resizable == "resizable" && window.resizeTo ? "1" : "0");

		var maxWidth = Math.round(screen.width * .85),
		maxHeight = Math.round(screen.height * .85),
		windowLeft = Math.round((screen.width - width)/2),
		windowTop = Math.round((screen.height - height)/2);

		width = width > maxWidth ? maxWidth : width;
		height = height > maxHeight ? maxHeight : height;

		var windowParams = "menubar=0," + scrollbars + ",titlebar=1," + resizable + ",width=" + width + ",height=" + height + ",left=" + windowLeft + ",top=" + windowTop + ",screenX=" + windowLeft + ",screenY=" + windowTop + ",status=0",
		currWindow = window.open(link.href, link.target, windowParams);

		if (currWindow._alreadyOpened) {
			currWindow.close();
			currWindow = null;
			currWindow = window.open(link.href, link.target, windowParams);
		}
		currWindow._alreadyOpened = true;

		currWindow.focus();
		return currWindow;
	}
})();