鼠标放上去自动点击代码,只自动点一次

<script language="JavaScript" type="text/JavaScript">
var autoclick_ok=false;
var cishu = 1
function mClk()  
{
if(!autoclick_ok && cishu==1)
{
var source=event.srcElement;source.click();
cishu+=1;
}
}
</script>
<span onmouseover=mClk()>
<a href="http://www.baidu.com/baidu?word=存储过程&tn=goaler" target="_blank">鼠标放上来看看</a>
</span>