ASP技巧：判断远程图片是否存在

ASP技巧：判断远程图片是否存在,原理是利用XMLHTTP.status来判断
function 
CheckURL(byval 
A_strUrl)
set 
XMLHTTP 
= 
Server.CreateObject("
Microsoft.XMLHTTP"
)
XMLHTTP.open 
"
HEAD"
,A_strUrl,false
XMLHTTP.send()
CheckURL=(XMLHTTP.status=200)
set 
XMLHTTP 
= 
nothing
end 
function
Dim 
imgurl
imgurl="
UploadFiles/2007829144940734.gif"

if 
CheckURL(imgurl) 
then
response.write 
"
图片存在"

else
response.write 
"
图片不存在"

end 
if

判断远程图片是否存在[js代码]


{
var 
oReq 
= 
new 
ActiveXObject("
Microsoft.XMLHTTP"
)
oReq.open("
Get"
,"
UploadFiles/2007829144941621.gif"
,false)

oReq.send()

//alert(oReq.status)
if(oReq.status==404)
alert(&
#39
不存在&
#39
)

else
alert("
存在"
)
}