几种点击连接时不出现虚边框的方法

<script>
function document.onclick(){
if(event.srcElement.tagName=="A")
event.srcElement.blur()
}</script>
<a href=####>Testlink</a>

<style>
a{dovia:expression(this.onfocus=this.blur);cursor:hand}
</style>
<a href=####><img src=http://www.dovia.net/logo.gif border=0></img></a>

<a href=#### hidefocus=true style="cursor:hand"><img src=http://www.dovia.net/logo.gif border=0></img></a>

<a href=# onfocus="blur()"><img src=http://www.dovia.net/logo.gif border=0></a>