<a href="#page1" rel="history">Page  1 </a>
<a href="#page2" rel="history">Page  2 </a>
<a href="#page3" rel="history">Page  3 </a>

function pageload(hash) {
	if (hash) changeContent(hash);
	else changeContent('page1');
}
$(document).ready(function() {
	$.historyInit(pageload);
	$("a[@rel='history']").click(function() {
		var hash = this.href;
		hash = hash.replace(/^.*#/, '');
		$.historyLoad(hash);
		return false;
	});
});

jQuery.extend({
	historyCurrentHash: undefined,
	historyCallback: undefined,
	historyInit: function(callback) {
		jQuery.historyCallback = callback;
		var current_hash = location.hash;
		jQuery.historyCurrentHash = current_hash;
		if(jQuery.browser.msie) {
			if (jQuery.historyCurrentHash == '') jQuery.historyCurrentHash = '#';
			$("body").prepend('<iframe id="jQuery_history" style="display: none;"></iframe>');
			var ihistory = $("#jQuery_history")[ 0 ];
			var iframe = ihistory.contentWindow.document;
			iframe.open();
			iframe.close();
			iframe.location.hash = current_hash;
		}
		jQuery.historyCallback(current_hash.replace(/^#/, ''));
		setInterval(jQuery.historyCheck,  100 );
	},
	historyCheck: function(){
		if(jQuery.browser.msie) {
			var ihistory = $("#jQuery_history")[ 0 ];
			var iframe = ihistory.contentDocument || ihistory.contentWindow.document;
			var current_hash = iframe.location.hash;
			if(current_hash != jQuery.historyCurrentHash) {
				location.hash = current_hash;
				jQuery.historyCurrentHash = current_hash;
				jQuery.historyCallback(current_hash.replace(/^#/, ''));
			}
		} else {
			var current_hash = location.hash;
			if(current_hash != jQuery.historyCurrentHash) {
				jQuery.historyCurrentHash = current_hash;
				jQuery.historyCallback(current_hash.replace(/^#/, ''));
			}
		}
	},
	historyLoad: function(hash) {
		var newhash;
		newhash = '#' + hash;
		location.hash = newhash;
		jQuery.historyCurrentHash = newhash;
		if(jQuery.browser.msie) {
			var ihistory = $("#jQuery_history")[ 0 ];
			var iframe = ihistory.contentWindow.document;
			iframe.open();
			iframe.close();
			iframe.location.hash = newhash;
			jQuery.historyCallback(hash);
		} else jQuery.historyCallback(hash);
	}
});