高手請指教:javascript與netscape难题

[mignwoo]

javascript中OnMouseOut/onMouseOver事件如何在Netscape中使用或被代替:
程序段一:
<a href="teachbldg/index.htm" target="_parent"><img src="image/topnav_teachbldg.gif" width="48" height="40" name="topnav_teachbldg" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('topnav_txt','','image/topnav_txt_teachbldg.gif','topnav_teachbldg','','image/topnav_teachbldg_f2.gif',1)" border="0"></a>

程序段二:
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

高手请指教!如何处理它在netscape4.X中也能正常显示,多谢!

[ekway]

在Dreamweaver操作环境里，按Shift+F3弹出“行为”，点击+号，选择“显示事件”，选择“Netscape 4.0”