var FrameManager = {

	currentFrameId : '',
	currentFrameHeight : 0,
	lastFrameId : '',
	lastFrameHeight : 0,
	resizeTimerId : null,

	init: function() {

		if (FrameManager.resizeTimerId == null) {

			FrameManager.resizeTimerId = window.setInterval(FrameManager.resizeFrames, 1000);

		}

	},

	resizeFrames: function() {

		FrameManager.retrieveFrameIdAndHeight();

		if ((FrameManager.currentFrameId != FrameManager.lastFrameId) || (FrameManager.currentFrameHeight != FrameManager.lastFrameHeight)) {

			var iframe = document.getElementById(FrameManager.currentFrameId.toString());

			if (iframe == null) return;

			iframe.style.height = FrameManager.currentFrameHeight.toString() + "px";

			FrameManager.lastFrameId = FrameManager.currentFrameId;
			FrameManager.lastFrameHeight = FrameManager.currentFrameHeight;
			window.location.hash = '';

		}

	},

	retrieveFrameIdAndHeight: function() {

		if (window.location.hash.length == 0) return;

		var hashValue = window.location.hash.substring(1);

		if ((hashValue == null) || (hashValue.length == 0)) return;

		var pairs = hashValue.split('&');

		if ((pairs != null) && (pairs.length > 0)) {

			for(var i = 0; i < pairs.length; i++) {

				var pair = pairs[i].split('=');

				if ((pair != null) && (pair.length > 0)) {

					if (pair[0] == 'frameId') {

						if ((pair[1] != null) && (pair[1].length > 0)) {

							FrameManager.currentFrameId = pair[1];
						}
					} else if (pair[0] == 'height') {

						var height = parseInt(pair[1]);

						if (!isNaN(height)) {

							FrameManager.currentFrameHeight = height;
							FrameManager.currentFrameHeight += 15;

						}
					}
				}
			}
		}

	},

	registerFrame: function(frame) {

		var currentLocation = location.href;
		var hashIndex = currentLocation.indexOf('#');

		if (hashIndex > -1) {

			currentLocation = currentLocation.substring(0, hashIndex);
		}

//		frame.contentWindow.location = frame.src + '?frameId=' + frame.id + '#' + currentLocation;
		frame.contentWindow.location = frame.src + '&frameId=' + frame.id + '#' + currentLocation;

	}
};

window.setTimeout(FrameManager.init, 300);