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POjQuery Plugin development help
 

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  1. POjQuery Plugin development help
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    <p>This is my first attempt at a plugin but I think I'm missing the whole "How to" on this.</p> <p>Ok here goes:</p> <p>Trying to write an error popup box for form validation.</p> <p>I like the look and functionality on this JavaScript code on this page, See demo here and source here.</p> <p>It's basically what I want to do if the user enters invalid data.</p> <p>Now I have tried to create a jQuery plugin with this code but it's not working, any help would be great :-)</p> <pre><code>(function($){ /* Might use the fadein fadeout functions */ var MSGTIMER = 20; var MSGSPEED = 5; var MSGOFFSET = 3; var MSGHIDE = 3; var errorBox = function(target, string, autohide, options) { var ebox = $(ebox); var eboxcontent = $(eboxcontent); var target = $(target); var string = $(string); var autohide = $(autohide); var obj = this; if (!document.getElementById('ebox')) { ebox = document.createElement('div'); ebox.id = 'ebox'; eboxcontent = document.createElement('div'); eboxcontent.id = 'eboxcontent'; document.body.appendChild(ebox); ebox.appendChild(eboxcontent); ebox.style.filter = 'alpha(opacity=0)'; ebox.style.opacity = 0; ebox.alpha = 0; } else { ebox = document.getElementById('ebox'); eboxcontent = document.getElementById('eboxcontent'); } eboxcontent.innerHTML = string; ebox.style.display = 'block'; var msgheight = ebox.offsetHeight; var targetdiv = document.getElementById(target); targetdiv.focus(); var targetheight = targetdiv.offsetHeight; var targetwidth = targetdiv.offsetWidth; var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2); var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET; ebox.style.top = topposition + 'px'; ebox.style.left = leftposition + 'px'; clearInterval(ebox.timer); ebox.timer = setInterval("fadeMsg(1)", MSGTIMER); if (!autohide) { autohide = MSGHIDE; } window.setTimeout("hideMsg()", (autohide * 1000)); // hide the form alert // this.hideMsg(msg) = function (){ var msg = document.getElementById('msg'); if (!msg.timer) { msg.timer = setInterval("fadeMsg(0)", MSGTIMER); } }; // face the message box // this.fadeMsg(flag) = function() { if (flag == null) { flag = 1; } var msg = document.getElementById('msg'); var value; if (flag == 1) { value = msg.alpha + MSGSPEED; } else { value = msg.alpha - MSGSPEED; } msg.alpha = value; msg.style.opacity = (value / 100); msg.style.filter = 'alpha(opacity=' + value + ')'; if (value &gt;= 99) { clearInterval(msg.timer); msg.timer = null; } else if (value &lt;= 1) { msg.style.display = "none"; clearInterval(msg.timer); } }; // calculate the position of the element in relation to the left of the browser // this.leftPosition(target) = function() { var left = 0; if (target.offsetParent) { while (1) { left += target.offsetLeft; if (!target.offsetParent) { break; } target = target.offsetParent; } } else if (target.x) { left += target.x; } return left; }; // calculate the position of the element in relation to the top of the browser window // this.topPosition(target) = function() { var top = 0; if (target.offsetParent) { while (1) { top += target.offsetTop; if (!target.offsetParent) { break; } target = target.offsetParent; } } else if (target.y) { top += target.y; } return top; }; // preload the arrow // if (document.images) { arrow = new Image(7, 80); arrow.src = "images/msg_arrow.gif"; } }; $.fn.errorbox = function(options) { this.each(function() { var element = $(this); // Return early if this element already has a plugin instance if (element.data('errorbox')) return; // pass options to plugin constructor var errorbox = new errorBox(this, options); // Store plugin object in this element's data element.data('errorbox', errorbox); }); }; </code></pre> <p>})(jQuery);</p> <p>How Im calling it</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"&gt; &lt;title&gt;jQuery Plugin - Error ToolTip&lt;/title&gt; &lt;script type="text/javascript" src="js/jquery.js"&gt; &lt;/script&gt; &lt;script type="text/javascript" src="js/jquery.errorbox.js"&gt; &lt;/script&gt; &lt;script type="text/javascript"&gt; $(document).ready(function(){ var name = document.getElementById('name'); if(name == "") { $('#name','You must enter your name.',2).errorbox(); alert("Blank"); } }); &lt;/script&gt; &lt;link rel="stylesheet" type="text/css" href="css/errorbox.css" /&gt; &lt;/head&gt; &lt;body&gt; &lt;div&gt; Name: &lt;input type="text" id="name" width="30"&gt;&lt;/input&gt; &lt;/div&gt; &lt;/body&gt; </code></pre> <p></p> <p>Any help on my first plugin would be great, thanks in advance.</p> <p>--Phill</p>
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    1. COSorry the source page: http://www.leigeber.com/2008/04/dynamic-inline-javascript-form-validation/ Demo page: http://sandbox.leigeber.com/messages/messages.html Download: http://www.leigeber.com/wp-content/uploads/2008/04/messages.zip
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