Form is set by me

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  • Scottie
    #1

    Form is set by me

    I have a drop-down box. I also have a var with a value. I want the
    value in the var to be displayed in the drop-down box. How can I do
    this?

    Thanks.

    Scott
    Tags: None
    • Bart Van der Donck
      #2
      Re: Form is set by me

      Scott wrote:
      [color=blue]
      > I have a drop-down box. I also have a var with a value. I want the
      > value in the var to be displayed in the drop-down box. How can I do
      > this?[/color]

      How should your var behave in regard to your dropdownbox? Is your
      dropdownbox already populated with <option>'s, before the code is
      invoked that would alter its content? Should the dropdownbox react on
      events on the webpage to get new content?

      Reading your question as it is stated, this basic code could be an
      answer:

      var myvar = "somevalue" ;
      document.write( '<select size=1 name=myselectbo x>');
      document.write( '<option value="'+myvar+ '">'+myvar+' </option>');
      document.write( '</select>');

      Bart

        Comment

        • Scottie
          #3
          Re: Form is set by me

          Bart,
          [color=blue]
          > How should your var behave in regard to your dropdownbox? Is your
          > dropdownbox already populated with <option>'s, before the code is
          > invoked that would alter its content? Should the dropdownbox react on
          > events on the webpage to get new content?[/color]

          I didn't get my message clear enough. My var already has a value. My
          dropdownbox is already populated with <options>'s. What I want to know
          is can my var be matched with the <option>'s directly and the <option>
          get executed.

          Scott

            Comment

            • Bart Van der Donck
              #4
              Re: Form is set by me

              > I didn't get my message clear enough. My var already has a value. My[color=blue]
              > dropdownbox is already populated with <options>'s. What I want to know
              > is can my var be matched with the <option>'s directly and the <option>
              > get executed.[/color]

              Well you still left a few things unspecified, but guessing at those,
              this code should do the trick:

              <html>
              <head>
              <!-- var already has value, I'm setting it here -->
              <script language="javas cript">
              var myvar = "somevalue" ;
              </script>
              </head>
              <body>
              <!-- your dropdownbox with its options, set in html -->
              <form action="somescr ipt.cgi">
              <select size="1" name="mybox">
              <option value="1">1</option>
              <option value="2">2</option>
              <option value="3">3</option>
              </select>
              </form>
              <!-- now change contents of the box -->
              <script language="javas cript">
              // empty the box
              while (document.forms[0].mybox.options. length)
              document.forms[0].mybox.options[0] = null;
              // put var in the box
              document.forms[0].mybox.options[document.forms[0].mybox.length]
              = new Option(myvar, myvar);
              // now set which option must be selected.
              // required in NS4, and handy in IE when you want
              // to select an option that doesn't come first
              document.forms[0].mybox.selected Index = 0;
              // now "execute" the dropdownbox: do you mean submitting the form?
              // if so, uncomment this line:
              // document.forms[0].submit();
              </script>
              </body>
              </html>

              Bart

                Comment

                • Scottie
                  #5
                  Re: Form is set by me

                  Bart,

                  I came up with this. It works:

                  var str = window.location .search; // returns
                  '?text=language ' from the URL
                  if (str != "") {
                  var temp = str.split('=');
                  for (i=1; i <= speclang.length ; i++) { // goes through whole
                  language array
                  if (temp[1] == speclang[i]) break; // found
                  }
                  if (i > speclang.length ) { // didn't find
                  alert(temp[1] + " was not found in the Mexican language list.");
                  return;
                  }
                  }
                  document.forms['Language'].selectname.sel ectedIndex = i; // make
                  dropdown box = passed language
                  languag(i); // update to specific language
                  }

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