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<html><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Keywords" name="Keywords"content="JavaScript, examples, JavaScript: The Definitive Guide"><title>Example 18-1 from JavaScript: The Definitive Guide, Fifth Edition</title><style>body { font-family: arial, sans-serif}.lefttitle { font: bold x-small arial, sans-serif; margin: 5px; letter-spacing: .15em; text-transform:uppercase;}.leftcaption { font: italic x-small sans-serif; margin-bottom: 20px;}#banner { font-family:sans-serif; color:#333; font-size:x-large; font-weight:normal; padding:15px; padding-top: 3px; border-bottom:4px double #666;}#banner h1 { font-size: x-large; margin: 0px; padding: 0px;}#banner .description { font-size:large; margin-left: 2px;}pre { border: solid black 1px; background-color: #ddd; padding: 10px; margin: 0px;} </style></script></head><body><div id="banner"><h1>davidflanagan.com/javascript5</h1><span class="description">Example 18-1 from<i>JavaScript: The Definitive Guide, Fifth Edition</i></span></div><div style="float: left; 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text-align: right"><a href="index.html" tppabs="http://www.davidflanagan.com/javascript5/index.html">Table of Examples</a></div><pre><form name="everything"> <!-- A one-of-everything HTML form... --> <table border="border" cellpadding="5"> <!-- in a big HTML table --> <tr> <td>Username:<br>[1]<input type="text" name="username" size="15"></td> <td>Password:<br>[2]<input type="password" name="password" size="15"></td> <td rowspan="4">Input Events[3]<br> <textarea name="textarea" rows="20" cols="28"></textarea></td> <td rowspan="4" align="center" valign="center"> [9]<input type="button" value="Clear" name="clearbutton"><br> [10]<input type="submit" name="submitbutton" value="Submit"><br> [11]<input type="reset" name="resetbutton" value="Reset"></td></tr> <tr> <td colspan="2"> Filename: [4]<input type="file" name="file" size="15"></td></tr> <tr> <td>My Computer Peripherals:<br> [5]<input type="checkbox" name="extras" value="burner">DVD Writer<br> [5]<input type="checkbox" name="extras" value="printer">Printer<br> [5]<input type="checkbox" name="extras" value="card">Card Reader</td> <td>My Web Browser:<br> [6]<input type="radio" name="browser" value="ff">Firefox<br> [6]<input type="radio" name="browser" value="ie">Internet Explorer<br> [6]<input type="radio" name="browser" value="other">Other</td></tr> <tr> <td>My Hobbies:[7]<br> <select multiple="multiple" name="hobbies" size="4"> <option value="programming">Hacking JavaScript <option value="surfing">Surfing the Web <option value="caffeine">Drinking Coffee <option value="annoying">Annoying my Friends </select></td> <td align="center" valign="center">My Favorite Color:<br>[8] <select name="color"> <option value="red">Red <option value="green">Green <option value="blue">Blue <option value="white">White <option value="violet">Violet <option value="peach">Peach </select></td></tr> </table></form><div align="center"> <!-- Another table--the key to the one above --> <table border="4" bgcolor="pink" cellspacing="1" cellpadding="4"> <tr> <td align="center"><b>Form Elements</b></td> <td>[1] Text</td> <td>[2] Password</td> <td>[3] Textarea</td> <td>[4] FileU</td> <td>[5] Checkbox</td></tr> <tr> <td>[6] Radio</td> <td>[7] Select (list)</td> <td>[8] Select (menu)</td> <td>[9] Button</td> <td>[10] Submit</td> <td>[11] Reset</td></tr> </table></div><script>// This generic function appends details of an event to the big Textarea// element in the form above. It is called from various event handlers.function report(element, event) { if ((element.type == "select-one") || (element.type == "select-multiple")){ value = " "; for(var i = 0; i < element.options.length; i++) if (element.options[i].selected) value += element.options[i].value + " "; } else if (element.type == "textarea") value = "..."; else value = element.value; var msg = event + ": " + element.name + ' (' + value + ')\n'; var t = element.form.textarea; t.value = t.value + msg;}// This function adds a bunch of event handlers to every element in a form.// It doesn't bother checking to see if the element supports the event handler,// it just adds them all. Note that the event handlers call report().// We're defining event handlers by assigning functions to the// properties of JavaScript objects rather than by assigning strings to// the attributes of HTML elements.function addhandlers(f) { // Loop through all the elements in the form for(var i = 0; i < f.elements.length; i++) { var e = f.elements[i]; e.onclick = function() { report(this, 'Click'); } e.onchange = function() { report(this, 'Change'); } e.onfocus = function() { report(this, 'Focus'); } e.onblur = function() { report(this, 'Blur'); } e.onselect = function() { report(this, 'Select'); } } // Define some special-case event handlers for the three buttons: f.clearbutton.onclick = function() { this.form.textarea.value=''; report(this,'Click'); } f.submitbutton.onclick = function () { report(this, 'Click'); return false; } f.resetbutton.onclick = function() { this.form.reset(); report(this, 'Click'); return false; }}// Finally, activate our form by adding all possible event handlers!addhandlers(document.everything);</script></pre><div class="lefttitle" style="padding:0px; text-align: right"><a href="index.html" tppabs="http://www.davidflanagan.com/javascript5/index.html">Table of Examples</a></div><p><script type="text/javascript">amazon_ad_tag="davidflanagancom"; amazon_ad_width="300"; amazon_ad_height="250"; amazon_ad_logo="hide";</script><script type="text/javascript" src="../../www.assoc-amazon.com/s/ads.js" tppabs="http://www.assoc-amazon.com/s/ads.js"></script></div></body></html>⌨️ 快捷键说明
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