javascript - how to change the value in the html tag using jquery - Stack Overflow

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I want to change the param value of the applet tag based on the value from the dropdown. I am new to jquery .can someone tell me how can i do it using jquery .

My applet code :

<applet id="decisiontree" code=".vaannila.utility.dynamicTreeApplet.class" archive="./appletjars/dynamictree.jar, ./appletjars/prefuse.jar" width ="1000" height="500" >
 <param name="dieasenmae" value="Malaria"/>
 </applet>

My dropdownc code :

<html:select name="AuthoringForm" property="disease_name" size="1" onchange="javascript:showSelected(this.value)">
<option>Malaria</option>
<option>High Fever</option>
<option>Cholera</option>
</html:select></p>

javascript:

function showSelected(value){
alert("the value given from dropdown is "+value);   
$("#decisiontree param[name='dieasenmae']").val(value); 
}

I want to change the param value of the applet tag based on the value from the dropdown. I am new to jquery .can someone tell me how can i do it using jquery .

My applet code :

<applet id="decisiontree" code=".vaannila.utility.dynamicTreeApplet.class" archive="./appletjars/dynamictree.jar, ./appletjars/prefuse.jar" width ="1000" height="500" >
 <param name="dieasenmae" value="Malaria"/>
 </applet>

My dropdownc code :

<html:select name="AuthoringForm" property="disease_name" size="1" onchange="javascript:showSelected(this.value)">
<option>Malaria</option>
<option>High Fever</option>
<option>Cholera</option>
</html:select></p>

javascript:

function showSelected(value){
alert("the value given from dropdown is "+value);   
$("#decisiontree param[name='dieasenmae']").val(value); 
}

• javascript
• jquery

Share Improve this question Follow edited Aug 29, 2011 at 11:34 bhalkian asked Aug 29, 2011 at 11:24 bhalkianbhalkian 49955 gold badges1515 silver badges3232 bronze badges 1

• 1 I'm not sure that the Java plug-in will accept these changes. That would mean to monitor the DOM tree and abort current applet's execution when changes are detected and it doesn't seem sensible. – Álvaro González Commented Aug 29, 2011 at 11:29

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 3

just use:

var myNewValue = 'my new value';

$("#decisiontree param[name='dieasenmae']").val( myNewValue );

Live example on JSBin.

Selector explanation:

$("#decisiontree param[name='dieasenmae']")
        ^          ^    ^        ^
        1          2    3        4

• 1 -> inside the ID decisiontree
• 2 -> find all elements of the type param
• 3 -> that has the attribute name
• 4 -> and that attribute value needs to be dieasenmae

---

Now that you know how to change the values, that does not mean it will work! as you need to understand and see how the <applet> will work, as normally, it loads all values on start, and no matter what you do after in the DOM, the Applet can just ignore it... there should have a refresh applet somewhere, for that, the easiest way is to follow up to this question:

Is there a way to reload/refresh a java applet from within the applet itself?

$('param').attr('value','your-value');

or

$('param').val('your-value');

Make sure to launch it when dom is ready or use document.ready

    $(document).ready(function()
    {
       $("#decisiontree param").val("newValue");
       // or
      $("#decisiontree param").attr("value","newValue");
});

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