图片预加载的使用
<script language="JavaScript" type="text/JavaScript"><!--function loadImages() { var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array(); var i,j=d.MM_p.length,a=loadImages.arguments; for(i=0; i<a.length; i++) if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}}//--></script><body onLoad="loadImages('bus.gif','busline2.gif','1.gif','2.gif','3.gif','4.gif','5.gif')"><img onmouseover="this.src='2.gif'" onmouseout="this.src='1.gif'" border="0" src="1.gif"></a>?