aparece una aureola cambiando de color alrededor de todo el texto destacandolo

Este es el script que puedes seleccionar, copiar y pegar directamente.
Esta parte del script hay que pegarlo entre las etiquetas BODY y /BODY, donde se quiera que aparezca el efecto:
<span id="theText" style="width:100%"> <h3 align="center"><font color="#3a6ca3"><font size="+5">Mundo JavaScript</font> </font><font color="#666666"> <!-- Encuentra + JavaScript en http://www.mundojavascript.com --> <script> // ^-the text that will be displayed <!-- //can be edited from here var from = 5; //the animation start value var to = 11; //the animation end value var delay = 55; //the animation speed var glowColor = "red"; //the first color var glowColor2 = "orange"; //the second color var glowColor3 = "yellow"; //the third color var glowColor4 = "lime"; //4th color var glowColor5 = "blue"; //5th color var glowColor6 = "magenta"; //last color //no more editing var i = to; var j = 0; textPulseDown(); function textPulseUp() { if (!document.all) return if (i < to) { theText.style.filter = "Glow(Color=" + glowColor + ", Strength=" + i + ")"; i++; theTimeout = setTimeout('textPulseUp()',delay); return 0; } if (i = to) { theTimeout = setTimeout('textPulseDown()',delay); return 0; } } function textPulseDown() { if (!document.all) return if (i > from) { theText.style.filter = "Glow(Color=" + glowColor2 + ", Strength=" + i + ")"; i--; theTimeout = setTimeout('textPulseDown()',delay); return 0; } if (i = from) { theTimeout = setTimeout('textPulseUp2()',delay); return 0; } } //Copyright (c) 2001 Coyotee Labs Romania (www.coyoteelabs.go.ro) //This script can be used freely as long as all copyright messages are //intact. Visit WWW.COYOTEELABS.GO.RO for more scripts function textPulseUp2() { if (!document.all) return if (i < to) { theText.style.filter = "Glow(Color=" + glowColor3 + ", Strength=" + i + ")"; i++; theTimeout = setTimeout('textPulseUp2()',delay); return 0; } if (i = to) { theTimeout = setTimeout('textPulseDown2()',delay); return 0; } } function textPulseDown2() { if (!document.all) return if (i > from) { theText.style.filter = "Glow(Color=" + glowColor4 + ", Strength=" + i + ")"; i--; theTimeout = setTimeout('textPulseDown2()',delay); return 0; } if (i = from) { theTimeout = setTimeout('textPulseUp3()',delay); return 0; } } function textPulseUp3() { if (!document.all) return if (i < to) { theText.style.filter = "Glow(Color=" + glowColor5 + ", Strength=" + i + ")"; i++; theTimeout = setTimeout('textPulseUp3()',delay); return 0; } if (i = to) { theTimeout = setTimeout('textPulseDown3()',delay); return 0; } } function textPulseDown3() { if (!document.all) return if (i > from) { theText.style.filter = "Glow(Color=" + glowColor6 + ", Strength=" + i + ")"; i--; theTimeout = setTimeout('textPulseDown3()',delay); return 0; } if (i = from) { theTimeout = setTimeout('textPulseUp()',delay); return 0; } } //--> </script></font></h3></span>