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Thread: Button when display a function

  1. #1
    Join Date
    Feb 2014

    Button when display a function

    Dear friends,

    How can I do thatů.

    When I press the button, a list of cars are display on screen.
    Once it display, I would like to have another button that display a list of prices when pressed.

    I did the first level, but when I press the button I have the car list without another button which contain the price list.

    HTML Code:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" >
        <title>Untitled Page</title>
    <p>Click to see</p>
    <button onclick="myFunction()">Press</button>
        function myFunction() {
            Cars = ["volvo", "doge", "mercedes", "ford", "mitsubishi", "mazda"];
            for (var i = 0; i < Cars.length; i++) {
                document.write(Cars[i] + "<br>");

  2. #2
    Join Date
    Dec 2005
    Either provide the associated prices lists or modify the following...
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    <html xmlns="http://www.w3.org/1999/xhtml">
    <title>2-level Drop Down Selection</title>
    <script type="text/javascript">
    // From: http://www.codingforums.com/showthread.php?t=223096
      var selOptions = [
    	  ['drink', 'water','milk','soda','wine','beer'],
    	  ['fruit', 'apple','orange','banana'],
    	  ['meat',  'beef','chicken','lamb','pork','loaf'],
          ['cake',  'sponge','chocolate','tiramissu','mud'],
      function setSel2Options(obj){
        oSel2.options.length = 0;
    	if (obj.selectedIndex == 0) { return; }
    	for( i=0; i < selOptions.length; i++) {
          if (obj.value == selOptions[i][0]) {
            oSel2.options[oSel2.options.length] = new Option('Select a '+obj.value,'',false,false);
    		for (j=1; j < selOptions[i].length; j++) {  
              oSel2.options[oSel2.options.length] = new Option(selOptions[i][j],selOptions[i][j],false,false);
            i = selOptions.length;
      window.onload=function() {
        oSel1 = document.getElementById('sel1');
        oSel2 = document.getElementById('sel2');
        oSel1.options[oSel1.options.length] = new Option('Select an option','',false,false);
    	for (i=0; i < selOptions.length; i++) {
          oSel1.options[oSel1.options.length] = new Option(selOptions[i][0],selOptions[i][0], false,false);
      var savedInfo = [];
      for (i=0; i<selOptions.length; i++) { savedInfo[i] = ''; }
      function saveSelOptions() {
        oSel1 = document.getElementById('sel1');
        oSel2 = document.getElementById('sel2');
    	savedInfo[oSel1.selectedIndex] = oSel1.value + ':'+ oSel2.value;
    	var str = '';  	for (var i=0; i<savedInfo.length; i++) { str += savedInfo[i] +"\n"; }
    	document.getElementById('choices').innerHTML = str;
      <select id="sel1"></select>
      <select id="sel2" onchange="saveSelOptions()"></select>
      <button onclick="document.getElementById('choices').innerHTML=''">Clear</button>
      <div style="float:left"> Choices: 
       <pre id="choices"></pre>
      </div><br style="clear:both">
    There are a number of other solutions available by using the search of this forum for "drop down" or "select box" terms.

  3. #3
    Join Date
    Mar 2007
    Crikey JMRKER, I think the guys a newbie.

    What I think needs explaining is when you use document,write in a script, unless you are writing in data at the time of page load, after the page load the use of document write will replace any JavaScript and HTML.

    So you need to use a dynamic approach as JMRKER has shown you.
    --> JavaScript Frameworks like JQuery, Angular, Node <--
    ... and please remember to wrap code with forum BBCode tags:-

    [CODE]...[/CODE] [HTML]...[/HTML] [PHP]...[/PHP]

    If you can't think outside the box, you will be trapped forever with no escape...

  4. #4
    Join Date
    Feb 2014
    Thanks a lot !

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