这里是我根据gif图像格式想出来的判断gif图像尺寸的方法，请大家给点意见up.htm<html><body><form action="up.asp" ENCTYPE="multipart/form-data" method="post"><table border=0 width=100% cellspacing="0"> <tr> <td width="30%">请选择您要上传的gif图片:</td> <td width="70%"><input type="file" name="pic" style="font-size:10pt;"></td> </tr></table> <p align="center"><input type="submit" value="提交" style="font-size:9pt;background-color:#54B060;color:white;"></form></body></html>up.asp<% FormSize = Request.TotalBytes FormData = Request.BinaryRead( FormSize ) bncrlf=chrb(13) & chrb(10) divider=leftb(formdata,instrb(formdata,bncrlf)-1) datastart=instrb(formdata,bncrlf & bncrlf)+4 dataend=instrb(datastart+1,formdata,divider)-datastart Image=midb(formdata,datastart,dataend) head_version = Ascb( midb( Image,1,3 ) ) head_subversion = Ascb( midb( Image,4,3 ) ) head_width_l = Ascb( midb( Image,7,1 ) ) head_width_h = Ascb( midb( Image,8,1 ) ) head_height_l = Ascb( midb( Image,9,1 ) ) head_height_h = Ascb( midb( Image,10,1 ) ) head_colors = Ascb( midb( Image, 11, 1 ) ) head_width_h = head_width_h * 256 head_height_h = head_height_h * 256 head_colors = head_colors And &H07 Response.Write "图像大小为" & head_width_h + head_width_l & "x" & head_height_h + head_height_l _ & "x" & 2^( head_colors + 1 ) %>
