ECMA Script: To update the web properties in SharePoint 2010

 
<script language="ecmascript" type="text/ecmascript">
 
    var clientContext = null;
    var web = null;
 
    function updateWebProperties() {
 
        clientContext = new SP.ClientContext.get_current();
        web = clientContext.get_web();
        web.set_title('Updated title');
        web.update();       
        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));
    }
 
    function onQuerySucceeded() {
 
        alert('Web title updated successfully')
    }
 
 
    function onQueryFailed(sender, args) {
 
        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
    }
    
</script>
    
<input id="btnupdateWebProperties" onclick="updateWebProperties()" type="button" value="Updatethe web properties"/>