Troubleshooting: The JavaScript code is not functioning properly for the textarea field in my select form

Greetings, I have been tirelessly searching for a solution to my problem with no luck. Here is the issue at hand: I am trying to set up a message board where users can select pre-made templates from a drop-down menu filled with static HTML tags. The goal is for users to be able to load these pre-made tags into the body of their message by selecting an option from the form's drop-down menu. I managed to make this work flawlessly in Firefox, however, Internet Explorer does not support the onclick function to call the JavaScript. Despite my efforts, I have struggled to get onchange on the select element to trigger my JavaScript code. Any assistance on this matter would be greatly appreciated! Thank you.

Below you will find the JavaScript and form that functions correctly in Firefox. Please note that there is a textarea that receives the values produced by the script.

JAVASCRIPT:

function add_event_setup()
{
document.dataform.bodytext.value += "<center><img src=\"../../images/kick_ass_title.jpg\"><br><span class=\"event_title\">INSERT TEXT</span><br><br><table width=\"500\" bgcolor=\"#FF0000\"><tr><td bgcolor=\"#000000\"></td></tr></table></center>";
}


THE FORM:

<select class="formselect">
  <option value="Setup" class="formselect">--Setup--</option>
  <option value="Setup1" onclick="add_event_setup()" style="border: 1px solid gray" class="formselect">Setup 1</option>
</select>
javascriptcssformsselectonchange

Answer №1

Explore these 3 different methods:

First Approach

JAVASCRIPT

 function handleEvent(selectElement) {

var val = selectElement.value;

if(val == "TF")
    alert("Perform this action");
else if(val == "JR")    
    alert("Execute that task");
else
    alert("try something else"); }

HTML

<select class="formselect" onchange="handleEvent(this);"> 
    <option value="Game Terms" class="formselect">--Game Terms--</option>
    <option value="TF" style="border: 1px solid gray" class="formselect">TimeFrame</option>
    <option value="JR" style="border: 1px solid gray" class="formselect">Jim Ross</option>
</select>

Second Method

HTML + JAVASCRIPT (Ensure the script tag comes after the select tag as demonstrated below)

<select id="myform" class="formselect"> 

    <option value="Game Terms" class="formselect">--Game Terms--</option>
    <option value="TF" style="border: 1px solid gray" class="formselect">TimeFrame</option>
    <option value="JR" style="border: 1px solid gray" class="formselect">Jim Ross</option>
</select> 
<script>
document.getElementById("myform").addEventListener("change", function() {

    var val = this.value;

    if(val == "TF") {

        alert("Perform this action");
    } else if(val == "JR") {

        alert("Execute that task");

        } else
         alert("try something else");


        }, false);
        </script>

Third Way

If you prefer to use jQuery:

JAVASCRIPT

var MyHandler = {

    initialize : function() {

        $('#myform').bind('change', function() {

            var val = $(this).val();

            if(val == "TF") {

                alert("Perform this action");
            } else if(val == "JR") {

                alert("Execute that task");

            } else
                 alert("try something else");           

        });

    }

};

$(document).ready(function() {

    MyHandler.initialize();
});

HTML

<select id="myform" class="formselect"> 

    <option value="Game Terms" class="formselect">--Game Terms--</option>
    <option value="TF" style="border: 1px solid gray" class="formselect">TimeFrame</option>
    <option value="JR" style="border: 1px solid gray" class="formselect">Jim Ross</option>
</select>

Answer №2

To properly handle the onchange event of a select element, you need to write JavaScript code.

<select onchange="if(this.options[this.selectedIndex].value=='Option1') handle_option1();">

If you want to individually manage each option:

<script language="javascript">
    function handleSelectChange(selectElement){
        switch(selectElement.options[selectElement.selectedIndex].value){
            case 'Option':
                //handle Option value
                break;
            case 'Option1':
                //handle Option1
                break;
            default:
                //do something by default, if needed
        }
    }
</script>
<select name="options" onchange="handleSelectChange(this);">
    <option value="Option">Option</option>
    <option value="Option1">Option1</option>
</select>

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