鼠标放上去图片会出现带颜色的边框

<style>
.borderimage{
border:1px solid white;
}
</style>
<script language="JavaScript1.2">

function borderit(which,color){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
which.style.borderColor=color
}
}
</script>
<img src="photo/yourimage.gif" class="borderimage" onMouseover="borderit(this,'blue')" onMouseout="borderit(this,'white')">