Question

我目前試圖從另一個網站添加實時視頻流到我自己的方便，似乎無法得到它的工作。使用選擇和選項，選擇ID =「選擇相機」的onchange =「交通（）。可能有人請指教一下我做錯了下文？

function traffic() <br> 
    { <br> 
    location[0] = "<img src='http://131940.qld.gov.au/DMR.Controls/WebCams/DisplayImage.ashx?FilePath=\Metropolitan\mecure.jpg&R=1369294224610' alt='Brisbane City Traffic Camera is Currently Unavailable'width='500' height='400'>"; <br> 
    location[1] = "<img src='http://131940.qld.gov.au/DMR.Controls/WebCams/DisplayImage.ashx?FilePath=\Metropolitan\Rochedale_Pac_Mwy_Sth.jpg&R=1369294358098' alt='Rochedale Traffic Camera is Currently Unavailable'width='500' height='400'>"; <br> 
    location[2] = "<b>Select a Traffic Camera</b>" <br> 
    list=document.getElementById("select camera"); <br> 
    index=list.selectedIndex; <br> 
document.getElementById("traffic").innerHTML=location[index]; <br> 
    } 

腳本請多關照我已經寫了droplist ！

Answer 1

當您更改選項，它會創建一個到服務器的請求：

POST: 
+ URL: 
     http://131940.qld.gov.au/DMRServices/WebCam/WebcamService.svc/GetNextRegionImage 
+ Data: regionId=104 
     webcamId=204 

，它會迴應是這樣的：

{"d":{"__type":"WebCamDTO:#DMR.Web.DMRServices.WebCam","CurrentId":0,"CurrentIndex":0,"Description":"Toowoomba - Bottom of Range looking East. ","HasRedAlert":true,"RedAlertDescription":"Warrego Highway, Redwood - Congestion: Both Directions - On...","RedAlertLocation":"Darling Downs - REDWOOD","RedAlertTime":"03:00 PM","RedAlertUrl":"\/Regions\/DarlingDowns\/Road-Conditions.aspx?regionId=104&tab=incident","Url":"\/DMR.Controls\/WebCams\/DisplayImage.ashx?FilePath=Darling_Downs\/toowoomba-range-bottom-helidon.jpg"}} 

您可以在響應結果

"Url":"\/DMR.Controls\/WebCams\/DisplayImage.ashx?FilePath=Darling_Downs\/toowoomba-range-bottom-helidon.jpg" 

看到它是你需要

http://131940.qld.gov.au/DMR.Controls/WebCams/DisplayImage.ashx?FilePath=Darling_Downs/toowoomba-range-bottom-helidon.jpg