No, they won't work that way... you will have to chain them together like this:

// this function starts the chain
function OpenImage(url){
   WebImageViewer1.RemoteInvoked = OpenImageCallBack;
   WebImageViewer1.RemoteInvoke('Remote_OpenImage', new Array(url));
}

function OpenImageCallBack(){
   WebImageViewer1.RemoteInvoked = ResizeWindowCallBack;
   ...
}

function ResizeWindowCallBack(){
   WebImageViewer1.RemoteInvoked = function(){};
   ...
}