javascript onclick create(element) div viz popup box

问题

I'm trying to make a pop up box, which gets invoked on clicking a button, this is what I've got so far.. http://jsfiddle.net/WGPhG/2/

回答1:

Here is a fiddle that actually does what you want - http://jsfiddle.net/WGPhG/6/

function popUp(){
    var popup = document.createElement('div');
    popup.className = 'popup';
    popup.id = 'test';
    var cancel = document.createElement('div');
    cancel.className = 'cancel';
    cancel.innerHTML = 'close';
    cancel.onclick = function (e) { popup.parentNode.removeChild(popup) };
    var message = document.createElement('span');
    message.innerHTML = "This is a test message";
    popup.appendChild(message);                                    
    popup.appendChild(cancel);
    document.body.appendChild(popup);
}

NOTES

To set the class on an element you use element.className instead of element.class. For the onclick event handler on the cancel element, it is better to directly assign the onclick handler with an anonymous function that does what you need as in my example above.

EDIT (More Efficient Way)

This is actually a much better of getting the results that you want because there is no overhead involved with recreating the elements every time the popup is shown. Fiddle - http://jsfiddle.net/WGPhG/7/

CSS

.popup
{
    position:absolute;
    top:0px;
    left:0px;
    margin:100px auto;
    width:200px;
    height:150px;
    font-family:verdana;
    font-size:13px;
    padding:10px;
    background-color:rgb(240,240,240);
    border:2px solid grey;
    z-index:100000000000000000;
    display:none
}

.cancel
{
    display:relative;
    cursor:pointer;
    margin:0;
    float:right;
    height:10px;
    width:14px;
    padding:0 0 5px 0;
    background-color:red;
    text-align:center;
    font-weight:bold;
    font-size:11px;
    color:white;
    border-radius:3px;
    z-index:100000000000000000;
}

HTML

<button onClick="openPopup();">click here</button>
<div id="test" class="popup">
    This is a test message
    <div class="cancel" onclick="closePopup();"></div>
</div>

function openPopup() {
    document.getElementById('test').style.display = 'block';
}

function closePopup() {
    document.getElementById('test').style.display = 'none';
}

回答2:

Try this update on JSFiddle

Changed :

Center page (fixed).
effect (fadein and fadeout)

HTML

<button onClick="openPopup();">click here</button>
<div id="test" class="popup" style="display:none;">
    This is a test message
    <div class="cancel" onclick="closePopup();"></div>
</div>

CSS

.popup {
    position:fixed;
    top:0px;
    left:0px;
    bottom:0px;
    right:0px;  
    margin:auto;
    width:200px;
    height:150px;
    font-family:verdana;
    font-size:13px;
    padding:10px;
    background-color:rgb(240,240,240);
    border:2px solid grey;
    z-index:100000000000000000;
}

.cancel {
    display:relative;
    cursor:pointer;
    margin:0;
    float:right;
    height:10px;
    width:14px;
    padding:0 0 5px 0;
    background-color:red;
    text-align:center;
    font-weight:bold;
    font-size:11px;
    color:white;
    border-radius:3px;
    z-index:100000000000000000;
}

.cancel:hover {
    background:rgb(255,50,50);
}

JS

function openPopup() {
    //document.getElementById('test').style.display = 'block';
   $('#test').fadeIn(1000);
}

function closePopup() {
    //document.getElementById('test').style.display = 'none';
    $('#test').fadeOut(500);
}

回答3:

Try This

function popUp(){
    var popup = document.createElement('div');
    popup.className = 'popup';
    popup.id = 'test';
    var cancel = document.createElement('div');
    cancel.className = 'cancel';
    cancel.setAttribute('onClick', 'document.getElementById("test").parentNode.removeChild('+popup +');')

    popup.innerHTML = "This is a test message";
    document.body.appendChild(popup);
    popup.appendChild(cancel);
 }

回答4:

I've updated your Fiddle and made it work.

The changed HTML...

 <button id="popupButton">click here</button>

Updated JavaScript...

document.onreadystatechange = function () {
    function popUp() {
        var popup = document.createElement('div');
        popup.className = 'popup';
        popup.id = 'test';

        popup.innerHTML = "This is a test message";

        var cancel = document.createElement('div');
        cancel.className = 'cancel';
        cancel.onclick= function () { popup.destroy(); }
        popup.appendChild(cancel);

        document.body.appendChild(popup);
    }

    document.getElementById('popupButton').onclick = popUp;
}

Did this answer your question or is there anything else?

Update Improved the code and the fiddle. Now open and close works

来源：https://stackoverflow.com/questions/11542822/javascript-onclick-createelement-div-viz-popup-box

标签

javascript

events

createelement