HTML meta tags for mobile or regular sites

For mobile site specifically:
<meta content='HandheldFriendly' name='true' />
<meta content='width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;' name='viewport' />
<meta name="viewport" content="width=device-width" />
<meta content='MobileOptimized' name='width' />
<meta content='HandheldFriendly' name='true' />
<meta name="google-site-verification" content="wYqVbCtxN_YM1tLTZmGkUDbEmNrSjpB7hBNp5_Avsvs" />


General meta tags for all sites:

<meta name="keywords" content="key words of you site" />
<meta name="description" content="description of your site" />

<meta http-equiv="Content-Typ" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=8" />

Display Close button on Input Box on iPhone

This can be easily archived by using new HTML5 input type: search. See the sample code below.