Why so much code for a single button?

  <table id="btn_table" style="padding-bottom:10px" height="300" width="300">
    	<tbody><tr><td style="cursor:pointer; background-image: url(img/button.png); background-repeat:no-repeat;" onclick="pushbutton()" height="300" align="center" valign="middle">
			<table height="250" cellpadding="0" cellspacing="0" width="250"><tbody><tr><td align="center" valign="middle"><span id="btn_text" style="width:250px; word-wrap:break-word; color:#ffffff; text-align:center; font-family: Arial bold, Helvetica, sans serif; font-size:36px"></span></td></tr></tbody></table>
		</td></tr>
	</tbody></table>