Blinkande gästboks menu

hej jag föröker ändra bilden på menun som heter gästbok, så fort nån användare skickar en gästbok till mig ska gästbok länken byta bild till en annan bild, så när jag loggar in i sidan så ser jag att nån har skcikat en gästboksinlägg.. och när jag klickar på bildmenun ska bilden ändras till den ursprungliga bilden...undrar hur det går till..någon som har förslag... det är väll med Onclick man använder sig av...men jag vet inte riktig hur..är inte så bra på javascript... vore tacksam för lite hjälp :)

Välkommen till wF
Kan göras med CSS också.. beroende på hur din HTML kod ser ut.
postar lite kod så får vi lite mer kött på våra ben :)

här är guestbook.tpl

<!-- INCLUDE header.tpl -->
<div id="contentheader">
{lang:"member","frm_guestbook"}
</div>
<table cellspacing="0" cellpadding="0" class="content" style="margin-bottom: 0px">
<tr>
<td class="header">
<!-- IF search_link != "" -->
<a href="{virtual_path}{search_link}">{lang:"member","back_to_search"}</a>
<!-- ENDIF -->
<a href="{virtual_path}{profile_link}">{lang:"member","back_to_profile"}</a>
<a href="#" onclick="showhide_field('sign_guestbook_form', '');return false">{lang:"member","sign_guestbook"}</a>
</td>
</tr>
</table>
<table id="sign_guestbook_form" cellspacing="0" cellpadding="0" class="content" style="display: none; margin-top: 0px; margin-bottom: 0px">
<form action="" name="guestbook" method="post">
<tr>
<td class="content" style="padding-bottom: 0px">
<textarea class="inputTextarea" cols="40" rows="5" style="width: 540px; height: 80px" name="body">{guestbook_comment}</textarea>
</td>
</tr>
<!-- IF system_guestbooks_captcha = "1" -->
<tr>
<td class="content" style="padding-bottom: 0px">
<table cellpadding="0" cellspacing="0">
<tr>
<td>
<img src="{virtual_path}includes/fns/fns.captcha.php">
</td>
<td>
<input type="text" class="inputText" name="captcha" style="width: 80px" maxlength="5" />
</td>
<td>
{lang:"member","verify_number"}
</td>
</tr>
</table>
</td>
</tr>
<!-- ENDIF -->
<tr>
<td class="content" style="padding-bottom: 0px">
<input class="inputSubmit" type="submit" name="submit" value="{lang:"member","submit"}" />
<input type="hidden" name="isguestbook" value="1" />
</td>
</tr>
</form>
</table>
<!-- IF hide_content != "1" -->
<table cellspacing="0" cellpadding="0" class="content" style="margin-top: 0px">
<tr>
<td class="content">
<!-- BEGIN guestbook_entries -->
<table cellspacing="0" cellpadding="0" width="100%">
<tr>
<td width="120" valign="top">
<div class="contentPicture">
<!-- IF member_picture_pending == "1" -->
<a href="{top.virtual_path}{member_profile_link}"><img src="{top.virtual_tpl_path}{top.loggedin_template}/media/pendingpicture.gif" alt="" border="0" /></a>
<!-- ELSEIF member_picture_adult == "1" -->
<!-- IF top.loggedin_showadult == "1" -->
<a href="{top.virtual_path}{member_profile_link}"><img src="{top.virtual_pic_path}{member_picture_preview}" alt="" border="0" /></a>
<!-- ELSE -->
<a href="{top.virtual_path}{member_profile_link}"><img src="{top.virtual_tpl_path}{top.loggedin_template}/media/adultpicture.gif" alt="" border="0" /></a>
<!-- ENDIF -->
<!-- ELSEIF member_picture_preview == "" -->
<img src="{top.virtual_tpl_path}{top.loggedin_template}/media/nopicture.gif" alt="" border="0" />
<!-- ELSE -->
<a href="{top.virtual_path}{member_profile_link}"><img src="{top.virtual_pic_path}{member_picture_preview}" alt="" border="0" /></a>
<!-- ENDIF -->
</div>
</td>
<td valign="top">
<h2>{lang:"member","posted_by"} <a href="{top.virtual_path}{member_profile_link}">{member_username}</a> {lang:"member","post_date"} {entry_post_date}</h2>

								\<div class="contentSummary"\>
									{entry_body}
								\</div\>
								\<!-- IF top.system_enable_reports AND top.system_enable_guestbook_reports AND top.loggedin_can_submit_reports --\>
									\<div align="right" id="report_guestbook_response{entry_id}"\>
										\<a class="report" href="#" onclick="showhide_field('report_guestbook_box{entry_id}');return false;"\>{lang:"core","report"}\</a\>
										\<div style="display: none" id="report_guestbook_box{entry_id}"\>
											\<table cellpadding="0" cellspacing="1"\>
												\<tr\>
													\<td style="padding: 6px; background: #F5F5F5"\>
														\<select class="inputCombo" id="report_guestbook_reason{entry_id}" name="report_guestbook_reason{entry_id}"\>
															\<option value=""\>{lang:"core","report_reason"}\</option\>
															{dropdownlist:top.system_report_reasons,"-1"}
														\</select\>
													\</td\>
													\<td style="padding: 6px; background: #F5F5F5"\>
														\<a href="#" onclick="submit_report('guestbook','{top.member_id}','{entry_id}','{lang:"core","report_no_reason"}');return false;"\>{lang:"core","submit"}\</a\>
													\</td\>
												\</tr\>
											\</table\>
										\</div\>
									\</div\>
								\<!-- ENDIF --\>
							\</td\>
						\</tr\>
					\</table\>
					\<div class="hr"\>\<hr /\>\</div\>
				\<!-- END guestbook_entries --\>
			\</td\>
		\</tr\>
		\<tr\>
			\<td class="footer"\>
				\<!-- IF next_page != "0" --\>
					\<a href="{virtual_path}{next_page_link}"\>{lang:"member","next_page"} &raquo;\</a\>
				\<!-- ENDIF --\>
				\<!-- IF previous_page != "0" --\>
					\<a href="{virtual_path}{previous_page_link}"\>&laquo; {lang:"member","previous_page"}\</a\>
				\<!-- ENDIF --\>
				\<span\>{pages_info}\</span\>
			\</td\>
		\</tr\>
	\</table\>
\<!-- ENDIF --\>

<!-- INCLUDE footer.tpl -->
och här är menun:

<li><a href="{virtual_path}{ifelse:system_enable_fancy_urls,"1","guestbook/index.html","index.php?m=guestbook"}" title="{lang:"core","usermenu_guestbook"}">{lang:"core","usermenu_guestbook"}</a></li>

någon förslag?