Javascript: Global variable within function

Is there a way to set a global Javascript function within HTML.

I can only pass it as a function like

  PostComment(this.content)

So i can only access it inside the PostComment function. Is there a way to acc开发者_StackOverflowess it in another function?

Just create the function as normal in your <script> tags like this

function postComment(content){
      //process content
}

it will be placed in the global namespace. Such practice is actually frowned against as it pollutes the global namespace. It is best practice to namespace your functions like

myNamesSpace.postComments(this.content) I assume the this here refers to an enclosing object, myNamespace in this case

You can always attach stuff to the global object, which is usually window in a browser.

window.myGlobalVar = ...;