如何自动点击图片

Question

Set IE = CreateObject("internetexplorer.Application")   
IE.Visible = 1   
IE.navigate "https://dashboard.opendns.com/settings/"   
Do While (IE.Busy)   
WScript.Sleep 10   
Loop   
Set Helem = IE.document.getElementByID("username")   
Helem.Value = " "
Set Helem = IE.document.getElementByID("password")   
Helem.Value = " " 
IE.Application.document.getElementById("sign-in").Click
WScript.Sleep 10   

a id =“dip22332965”title =“更新此文字”href =“＃”onclick =“update_ip（22332965）; return false” img width =“11”height =“13”style =“border：0pt none; margin-bottom：-1px;”src =“https://d2v7u03x06aro3.cloudfront.net/img/icon_update_small.gif” 我按照上面提到的如何点击图片脚本

成功地按下了按钮