img src防缓存

//加时间戳防缓存
var imgurl = "/pcms/headImg/${sessionScope.accountInfo.accountId}_cut.jpg?time="+new Date().getTime();
$('.header-portrait img').remove();
$('.header-portrait').prepend('<img src='+imgurl +
 '\t onerror="javascript:this.src=\'/pcms/headImg/default.jpg\'">');