if (modernizr.localstorage) { // LocalStorage ??? ???? ???? ????? } else { ?? ( '????? ?? ????? ???? ???? ??? ?? ??? ??? ? ????'); setitem ( 'key', 'value')? ???? ???? ?? ????? ? ? ????. ???? ??? 5MB? ???? quota_execeeded_err ??? ?????. ??? ???? ????? ???? ??? ??/?? ??? ???? ?? ?? ????. ????? ?? ???? ??? ??? ???? ???? ?? ????? ???? ??? ??? ? ????. ?? ?? ???? ????? ??? ??? ???? ???? ?? ??? ??????. ??? ?? ??? ?? ?? ???? ??? ??????. ?/? ?? ??? ??? ???? ??? ???? ? ? ????. ? ???? ???? ?? ? ?? ? ?? ?? ??? ???? ? ? ????. getItem ( '?')? ??????? ??? ???? ???? ? ??????.

<span>function setSettings() {
</span><span>if ('localStorage' in window && window['localStorage'] !== null) {
</span>	<span>try {
</span>		<span>var favcolor = document.getElementById('favcolor').value;
</span>		<span>var fontwt = document.getElementById('fontwt').value;
</span>		<span>localStorage.setItem('bgcolor', favcolor);
</span>		<span>localStorage.fontweight = fontwt;
</span>	<span>} catch (e) {
</span>		<span>if (e == QUOTA_EXCEEDED_ERR) {
</span>			<span>alert('Quota exceeded!');
</span>		<span>}
</span>	<span>}
</span>	<span>} else {
</span>		<span>alert('Cannot store user preferences as your browser do not support local storage');
</span>	<span>}
</span><span>}</span>

<span>function applySetting() {
</span>	<span>if (localStorage.length != 0) {
</span>	<span>document.body.style.backgroundColor = localStorage.getItem('bgcolor');
</span>	<span>document.body.style.fontSize = localStorage.fontweight + 'px';
</span>	<span>document.getElementById('favcolor').value = localStorage.bgcolor;
</span>	<span>document.getElementById('fontwt').value = localStorage.fontweight;
</span>	<span>} else {
</span>	<span>document.body.style.backgroundColor = '#FFFFFF';
</span>	<span>document.body.style.fontSize = '13px'
</span>	<span>document.getElementById('favcolor').value = '#FFFFFF';
</span>	<span>document.getElementById('fontwt').value = '13';
</span>	<span>}
</span><span>}</span>

<span>function clearSettings() {
</span>		<span>localStorage.removeItem("bgcolor");
</span>		<span>localStorage.removeItem("fontweight");
</span>		<span>document.body.style.backgroundColor = '#FFFFFF';
</span>		<span>document.body.style.fontSize = '13px'
</span>		<span>document.getElementById('favcolor').value = '#FFFFFF';
</span>		<span>document.getElementById('fontwt').value = '13';
</span>
<span>}</span>

??? ???? ?? ??? ????

<span>window.addEventListener('storage', storageEventHandler, false);
</span>	<span>function storageEventHandler(event) {
</span>			<span>applySetting();
</span>	<span>}</span>

? ??? HTML5 ? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!