Free JavaScript codes

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Demo: JavaScript Better JavaScript Minification

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Demo: JavaScript HOT New JavaScript APIs with HTML5

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Demo: JavaScript Amazing and Cool HTML Tooltips with JavaScript-jQuery

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Demo: JavaScript JavaScript Objects: Compare and Clone

How to setup

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Demo: JavaScript JavaScript Add More Unlimited Input Fields

How to setup

Step 1: Copy & Paste CSS code below in your HEAD section
CSS

Code:

---

<style type="text/css">
/*
    This script downloaded from www.JavaScriptBank.com
    Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
*/
#imageUpload input {
        display: block;
}
</style>

---

Step 2: Use JavaScript code below to setup the script
JavaScript

Code:

---

<script type="text/javascript">
// Created by: Jeroen Haan | http://www.haan.net
// This script downloaded from JavaScriptBank.com

function fileFields() {
        var x = document.getElementById('imageUpload');
        x.onclick = function() {
                  var i = parseFloat(this.lastChild.id)+1;
                  input = document.createElement("input");
                  input.setAttribute("type", "file");
                  input.setAttribute("name", 'imageName_' + i);
                  input.setAttribute("id", i);
                  this.appendChild(input);
        }
}

// Multiple onload function created by: Simon Willison
// http://simonwillison.net/2004/May/26/addLoadEvent/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
  fileFields();
});
</script>

---

Step 3: Copy & Paste HTML code below in your BODY section
HTML

Code:

---

<a href="#" id="imageUpload"><input type="file" name="imageName_1" id="1" /></a>

---

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Demo: JavaScript Browser Cookie with JavaScript and jQuery

How to setup

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Demo: JavaScript JavaScript Color Gradient Maker

How to setup

Step 1: Place JavaScript below in your HEAD section
JavaScript

Code:

---

<script type="text/javascript">
// Created by: Joseph Myers | http://www.codelib.net/
// This script downloaded from www.JavaScriptBank.com

function colorscale(hexstr, scalefactor) {
/* declared variables first, in order;
  afterwards, undeclared local variables */
  var r = scalefactor;
  var a, i;
  if (r < 0 || typeof(hexstr) != 'string')
    return hexstr;
    hexstr = hexstr.replace(/[^0-9a-f]+/ig, '');
    if (hexstr.length == 3) {
    a = hexstr.split('');
  } else if (hexstr.length == 6) {
    a = hexstr.match(/(\w{2})/g);
  } else
    return hexstr;
  for (i=0; i<a.length; i++) {
    if (a[i].length == 2)
      a[i] = parseInt(a[i], 16);
    else {
      a[i] = parseInt(a[i], 16);
      a[i] = a[i]*16 + a[i];
  }
}

var maxColor = parseInt('ff', 16);

function relsize(a) {
  if (a == maxColor)
  return Infinity;
  return a/(maxColor-a);
}

function relsizeinv(y) {
  if (y == Infinity)
  return maxColor;
  return maxColor*y/(1+y);
}

for (i=0; i<a.length; i++) {
  a[i] = relsizeinv(relsize(a[i])*r);
  a[i] = Math.floor(a[i]).toString(16);
  if (a[i].length == 1)
  a[i] = '0' + a[i];
}
return a.join('');
}

function showrainbow(f) {
  var colorcell, hex, i, nhex;
  hex = f.orig.value;
  hex = hex.replace(/\W/g, '');
  nhex = colorscale(hex, f.scalef.value-0);
  if (nhex != hex) {
    f.outp.value = nhex;
    colorcell = document.getElementById('origcolor');
    i = document.getElementById('newcolor');
    colorcell.style.background = '#' + hex;
    i.style.background = '#' + nhex;
    for (i=0; i<256; i++) {
      colorcell = document.getElementById('colorcell'+i);
      nhex = colorscale(hex, i/(256-i));
      colorcell.style.background = '#' + nhex;
      colorcell.nhexvalue = nhex;
    }
  }
}
</script>

---

Step 2: Place HTML below in your BODY section
HTML

Code:

---

<div style="width: 400px;">
<form>
<p>
Original color: <input type="text" name="orig" value="339990"><br>
Scale factor: <input type="text" name="scalef" value="4"><br>
<input type="button" value="Output" onclick="showrainbow(this.form)">
<input type="text" readonly name="outp" style="border: none;">
</p>
</form>

<table width="150">
<tr>
<td width="50%" height="50" id="origcolor">Original</td>
<td width="50%" id="newcolor">New</td></tr>
</table>

<table cellpadding="0" cellspacing="0">
<tr>
<script type="text/javascript">
for (i=0; i<256; i++)
document.write('<td width="10" height="50" id="colorcell', i, '" onclick="document.forms[0].outp.value = this.nhexvalue"></td>');
</script>
</tr>
</table>

</div>

---

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Demo: JavaScript Built-in JavaScript RegEx APIs

How to setup

JavaScript Line Graph script - JavaScript Virtual Keyboard - JavaScript Horizontal Slider

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Demo: JavaScript JavaScript OOP with Input Display Toggle

How to setup

Step 1: Place JavaScript below in your HEAD section
JavaScript

Code:

---

<script type="text/javascript">
// Created by: Fang | http://www.webdeveloper.com/forum/showthread.php?p=872326#post872326
// This script downloaded from www.JavaScriptBank.com

function addElement() {
var aInput=document.getElementById('myspan').getElementsByTagName('input');
for(var i=0; i<aInput.length; i++) {
    aInput[i].onclick=new Function('addDelete(this)');
    }
}

function addDelete(obj) {
var parentSpan=document.getElementById('myspan');
if(obj.nextSibling.nodeName!='INPUT') { // add
    var oInputText=document.createElement('input');
    oInputText.setAttribute('type', 'text');
    parentSpan.insertBefore(oInputText, obj.nextSibling);
    }
else { // delete
    parentSpan.removeChild(obj.nextSibling);
    }
}

// Multiple onload function created by: Simon Willison
// http://simonwillison.net/2004/May/26/addLoadEvent/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
  addElement();
});
</script>

---

Step 2: Copy & Paste HTML code below in your BODY section
HTML

Code:

---

<span id="myspan">
  <input type="checkbox">

  <input type="checkbox">
  <input type="checkbox">
</span>

---

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