Unable to get property 'setItem' of undefined or null reference

When using localStorage in HTML5, and try to setItem, the below error will happen:

[Unable to get property 'setItem' of undefined or null reference]

The cause of the error is running the page without use web server such us IIS.
Just add the page with site under IIS and try.

10 ways to call Javascript code using C# and ASP.NET

There 10 ways to call Javascript code using ASP.NET and C#, you can download the attached files and test all ways.
http://www.4shared.com/file/L8-tE7DV/CallJSCode.html

Close Tab Using ESC

<html>
<head>
<script>
function checkForEsc(e)
{
 if(!e)
  e = window.event;
 var key = e.keyCode;
 if(key==27)
  doCancel();
}

function doCancel()
{
 window.parent.close();
}
</script>
</head>
<BODY onkeypress=checkForEsc(event);>
</body>
</html>

Adding Client Confirmation

To add client confirmation, such us when you want delete item:

OnClientClick = '<%#Eval("FieldName", "Javascript:return confirm(\"{0}\")") %>'