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<head><title>mark tag in html5</title>
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<header>
<b>jQuery</b><br />
<span style="margin-left:210px;">jQuery is amazing !!!</span>
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<p>The header section represents a header section in the document.
The HTML header tag represents a group of introductory or navigational aids.
The header tag cannot be placed within a footer, address or another header element.
The header tag is supported in Internet Explorer 9, Firefox, Opera, Chrome, and Safari. IE8 and earlier versions does not support header tag.</p>
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b
{
margin-left:240px;
font-size:20px;
font-weight:bolder;
}