Global variable

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  • chirs
    #1

    Global variable

    Hi,

    If I have a global variable in one <SCRIPT>...</script>, is it
    available in the 2nd <SCRIPT>...</script>. I do not know if "global"
    means the whole document or the whole <SCRIPT>...</script> only.

    Chris
    Tags: None
    • Lee
      #2
      Re: Global variable

      chirs said:[color=blue]
      >
      >Hi,
      >
      >If I have a global variable in one <SCRIPT>...</script>, is it
      >available in the 2nd <SCRIPT>...</script>. I do not know if "global"
      >means the whole document or the whole <SCRIPT>...</script> only.[/color]


      <html>
      <body>

      <script type="text/javascript">
      alpha="Hello, world!";
      </script>

      <script type="text/javascript">
      alert(alpha);
      </script>

      It's often easier to test than to ask.

      </body>
      </html>

        Comment

        • Douglas Crockford
          #3
          Re: Global variable

          > If I have a global variable in one <SCRIPT>...</script>, is it[color=blue]
          > available in the 2nd <SCRIPT>...</script>. I do not know if "global"
          > means the whole document or the whole <SCRIPT>...</script> only.[/color]

          First of all, chirs (if that's your real name), you should get in the habit of
          getting your capitalization right.

          <SCRIPT>...</script>

          is at best sloppy, and sometimes terrible wrong. You usually want to use all
          lower case.

          In browsers, the so-called window object is the global object. All of the
          scripts of a document will share the same window object.

          JavaScript: A Survey of the Language
          http://www.crockford.com/javascript/survey.html


            Comment

            • Rosalie Mignon
              #4
              Re: Global variable

              "global" variables are really members of the default object (window).
              So, outside of a function, the following 3 statements are equivalent:
              x=1
              var x=1
              window.x=1

              and inside of a function, the following 2 statements are equivalent:
              x=1
              window.x=1

              You can initialize and access those "global" variables from separate script
              blocks, wherever window is available in fact.

              Hope this helps
              "chirs" <yma@kicon.co m> a écrit dans le message de
              news:4c22a744.0 312010912.2a422 bf5@posting.goo gle.com...[color=blue]
              > Hi,
              >
              > If I have a global variable in one <SCRIPT>...</script>, is it
              > available in the 2nd <SCRIPT>...</script>. I do not know if "global"
              > means the whole document or the whole <SCRIPT>...</script> only.
              >
              > Chris[/color]


                Comment

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