下面这段话是指将网页表单中提供的[sayyes][/sayyes]之间的图片路径进行转换，转换后图片是默认左对齐的，请能者帮忙修改一下，将图片居中对齐，多谢了！！
function changechr(str)
changechr=replace(replace(replace(replace(str,"<","<"),">",">"),chr(13),"
")," "," ")
changechr=replace(replace(replace(replace(changechr,"[sayyes]",""),"[red]",""),"[big]","")
changechr=replace(replace(replace(replace(changechr,"[/sayyes]",">"),"",""),"[/red]",""),"[/big]","")
end function