//以下是解决的方法(我转贴出来,详见原网页)
Automatically enable IE script deugging is a new feature in IE8.
I have contacted our newsgroup members and got serveral workarounds about disabling this automatically script debugging:
Workaround one:
1. Start without debugging (press Ctrl + F5)
2. Attach Visual Studio Debugger to WebDev.WebServer.exe process
Workaround two:
1. Right click the Web application and choose Properties,
2. Click Web tab on the left and choose "Don't open page" radio button on the left panel
3. Start Debugging (press F5)
4. Open IE and navigate the URL.
Workaround three:
1. Open the application Property page and choose Web tab
2. Click "Start External Program" radio button and input the path to the iexplorer.exe
3. Type the URL in the "Command line argument" option
4. Press F5 and start debugging.