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Add client scripts for radio-type INPUT (add JS implementation to disable onClick event idea code)

Source: Internet
Author: User
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The following example shows that the result is no reload display and submission.
When you select an option, a function is called "getVote ()" for execution. "OnClick" event caused by this function Copy codeThe Code is as follows: <Head>
<Script type = "text/javascript">
Function getVote (int)
{
If (window. XMLHttpRequest)
{// Code for IE7 +, Firefox, Chrome, Opera, Safari
Xmlhttp = new XMLHttpRequest ();
}
Else
{// Code for IE6, IE5
Xmlhttp = new ActiveXObject ("Microsoft. XMLHTTP ");
}
Xmlhttp. onreadystatechange = function ()
{
If (xmlhttp. readyState = 4 & xmlhttp. status = 200)
{
Document. getElementById ("poll"). innerHTML = xmlhttp. responseText;
}
}
Xmlhttp. open ("GET", "poll_vote.php? Vote = "+ int, true );
Xmlhttp. send ();
}
</Script>
</Head>
<Body>

<Div id = "poll">
<H3> Do you like PHP and AJAX so far? </H3>
<Form>
Yes:
<Input type = "radio" name = "vote" value = "0" onclick = "getVote (this. value)"/>
<Br/> No:
<Input type = "radio" name = "vote" value = "1" onclick = "getVote (this. value)"/>
</Form>
</Div>
</Body>
</Html>

The getVote () function does the following:
Create an XMLHttpRequest object
Create the function to be executed when the server response is ready
Send the request off to a file on the server
Notice that a parameter (vote) is added to the URL (with the value of the yes or no option)
Determines whether the disabled attribute of the control is true. If yes, return false; disables the onclick event of radio and enables it again.
Method 1: Disable and re-enable the function at the same time. The function can only be used for button text INPUT, and The onclick event cannot be disabled for the div)
<Input type = "button" value = "A button. click me to see the alert box. "onclick =" alert ('I am clicked. '); "id =" cmd1 "/>
<Br/>
<Input type = "button" value = "Click me to disable the first button" onclick = "document. getElementById ('cm1'). disabled = true;"/>
<Br/>
Method 2 and 3: (to remove the onclick event of radio, you must register the event again to disable the onclick event of div)
<Input type = "button" value = "Click me to disable the onclick event on first button" onclick = "document. getElementById ('cm1 '). onclick = function () {}; "/>

<Br/>
III:
<Input type = "button" value = "Click me to disable the onclick event on first button" onclick = "document. getElementById ('cm1'). onclick = null;"/>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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