<style>
.rui-msgbox .ui-dialog-titlebar-close {display:none;}
.rui-msgbox .rui-fragment-content {height:100%;padding:20px;padding-bottom:30px;} 
</style>

<table id="msgbox-error" class="rui-fragment" cellpadding="0" cellspacing="0" height="100%" width="100%">
<tr>
	<td class="rui-fragment-content">  
		<span id="msgbox-label">&nbsp;</span>
	</td> 
</tr> 
<tr>
	<td style="height:1px;">
		<div class="rui-fragment-footer-separator"></div> 
	</td> 
</tr>
<tr> 
	<td class="rui-fragment-footer"> 
		<button class="rui-button" onclick="return MsgBox.close(this);">
			<span class="rui-button-content-wrapper">
				<span class="rui-button-icon rui-icon rui-icon-apply"></span>
				<span class="rui-button-icon-separator iconleftseparator"></span>
				<span class="rui-button-content">  OK  </span>
			</span> 	
		</button> 
	</td> 
</tr>
</table>
