Please below code to blink button / label. and this will work with any bowser.
it is tested. you can mail me on mnkumar1976@gmail.com
<script type="text/javascript">
function enableBlink()
{
var aryBlinkingElements = document.getElementsByTagName("BLINK1")
for(i=0;i<aryBlinkingElements.length;i++)
{
objElement = aryBlinkingElements[i];
if (objElement.style.visibility == "visible") {
objElement.style.visibility = "hidden";
}
else {
objElement.style.visibility = "visible";
}
}
setTimeout('enableBlink()', 1000);
}
</script>
<body onload="enableBlink()">
<pre lang="xml"><Blink1> <asp:LinkButton ID="HelpBtn" runat="server" Text="| Monthly Highlight "
CssClass="txtUserLogin" OnClick="HelpBtn_Click" CausesValidation="False"
ToolTip="Click for monthly highlight " Visible="true"></asp:LinkButton></blink1></pre></body>