Getting Cookie Value using javascript

<h1>The Below code is used to get Cookie using javascript</h1>
<script type="text/javascript">
function Get_Cookie( name ) {
var start = document.cookie.indexOf( name + "=" );
var len = start + name.length + 1;
if ( ( !start ) &&
( name != document.cookie.substring( 0, name.length ) ) )
{
return null;
}
if ( start == -1 ) return null;
var end = document.cookie.indexOf( ";", len );
if ( end == -1 ) end = document.cookie.length;
return unescape( document.cookie.substring( len, end ) );
}
alert(Get_Cookie("eg"));
</script>