Javascript / Text / Fading Text
General Details
Snippet uploaded by: snippet
Email : webmaster@snippetlibrary.com
Snippet By: WarpGear Software
<!---Head--->
<!-- STEP ONE: Paste this code into the HEAD of your HTML document -->
<!-- start: WarpGear JavaScript Fader v1.0 -->
<div id="fader" style="position:absolute; top:35px; left:50px; width:600px; text-align:center;"></div>
<!-- adjust style= to position messages -->
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: WarpGear Software (jsfader@warpgear.com) -->
<!-- Web Site: http://www.warpgear.com/developer -->
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
<!-- Begin
// texts:
// Your messages wich may contain regular html tags but
// must at least contain: [ <font color='{COLOR}'> ]
// Use single quotes [ ' ] in your html only. If you need
// a double quote in the message itself use an escape
// sign like this: [ " ] (not including the brackets)
var texts = new Array(
"<font size='+2' color='{COLOR}' face='Arial'><strong>A D D</strong></font>",
"<font size='+3' color='{COLOR}' face='Arial'><strong>this</strong></font>",
"<font size='+4' color='{COLOR}' face='Arial'><strong>J a v a S c r i p t</strong></font>",
"<font size='+3' color='{COLOR}' face='Arial'><strong>to</font>",
"<a href='http://www.javascriptsource.com' target='_top'><font size='+3' color='{COLOR}' face='Arial'><strong>Your Site Today!</strong></font></a>");
var bgcolor = "#000000"; // background color, must be valid browser hex color (not color names)
var fcolor = "#FF8000"; // foreground or font color
var steps = 20; // number of steps to fade
var show = 500; // milliseconds to display message
var sleep = 30; // milliseconds to pause inbetween messages
var loop = true; // true = continue to display messages, false = stop at last message
// Do Not Edit Below This Line
var colors = new Array(steps);
getFadeColors(bgcolor,fcolor,colors);
var color = 0;
var text = 0;
var step = 1;
// fade: magic fader function
function fade() {
// insert fader color into message
var text_out = texts[text].replace("{COLOR}", colors[color]); // texts should be defined in user script, e.g.: var texts = new Array("<font color='{COLOR}' sized='+3' face='Arial'>howdy</font>");
// actually write message to document
if (document.all) fader.innerHTML = text_out; // document.all = IE only
if (document.layers) { document.fader.document.write(text_out); document.fader.document.close(); } // document.layers = Netscape only
// select next fader color
color += step;
// completely faded in?
if (color >= colors.length-1) {
step = -1; // traverse colors array backward to fade out
// stop at last message if loop=false
if (!loop && text >= texts.length-1) return; // loop should be defined in user script, e.g.: var loop=true;
}
// completely faded out?
if (color == 0) {
step = 1; // traverse colors array forward to fade in again
// select next message
text += 1;
if (text == texts.length) text = 0; // loop back to first message
}
// subtle timing logic...
setTimeout("fade()", (color == colors.length-2 && step == -1) ? show : ((color == 1 && step == 1) ? sleep : 50)); // sleep and show should be defined in user script, e.g.: var sleep=30; var show=500;
}
// getFadeColors: fills Colors (predefined Array)
// with color hex strings fading from ColorA to ColorB
// note: Colors.length equals the number of steps to fade
function getFadeColors(ColorA, ColorB, Colors) {
len = Colors.length;
// strip '#' signs if present
if (ColorA.charAt(0)=='#') ColorA = ColorA.substring(1);
if (ColorB.charAt(0)=='#') ColorB = ColorB.substring(1);
// substract rgb compents from hex string
var r = HexToInt(ColorA.substring(0,2));
var g = HexToInt(ColorA.substring(2,4));
var b = HexToInt(ColorA.substring(4,6));
var r2 = HexToInt(ColorB.substring(0,2));
var g2 = HexToInt(ColorB.substring(2,4));
var b2 = HexToInt(ColorB.substring(4,6));
// calculate size of step for each color component
var rStep = Math.round((r2 - r) / len);
var gStep = Math.round((g2 - g) / len);
var bStep = Math.round((b2 - b) / len);
// fill Colors array with fader colors
for (i = 0; i < len-1; i++) {
Colors[i] = "#" + IntToHex(r) + IntToHex(g) + IntToHex(b);
r += rStep;
g += gStep;
b += bStep;
}
Colors[len-1] = ColorB; // make sure we finish exactly at ColorB
}
// IntToHex: converts integers between 0-255 into a two digit hex string.
function IntToHex(n) {
var result = n.toString(16);
if (result.length==1) result = "0"+result;
return result;
}
// HexToInt: converts two digit hex strings into integer.
function HexToInt(hex) {
return parseInt(hex, 16);
}
// body tag must include: onload="fade()" bgstyle="color:#000000" where bgcolor equals bgcolor in javascript above
// End -->
</script>
<!---Body--->
<!-- STEP TWO: Insert the onLoad event handler into your BODY tag -->
<BODY onLoad="fade()" bgstyle="color:#000000">
<p><center>
<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
</center><p>
<!-- Script Size: 5.22 KB -->
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