At the head of your document:
<script language="JavaScript" type="text/javascript"> <!-- // **** Customising Variables var zxcBlankImg='http://www.vicsjavascripts.org.uk/StdImages/Blank.gif';// a blank .gif as a background image or null if not required null; // Functional Code - NO NEED to Change var zxcOOPCnt=0; function zxcZoomText(zxcobj,zxcssz,zxcfsz,zxcspd){ if (typeof(zxcobj)=='string'){ zxcobj=document.getElementById(obj); } if (!zxcobj.oopct){ zxcspd=zxcspd||100; if (zxcBlankImg){ zxcobj.style.backgroundImage='url('+zxcBlankImg+')'; } zxcobj.oopct=new zxcOOPTxtZoom(zxcobj,zxcssz,zxcfsz,zxcspd); } clearTimeout(zxcobj.oopct.to); zxcobj.oopct.minmax[4]*=-1; zxcobj.oopct.cngtxt(); } function zxcOOPTxtZoom(zxcobj,zxcssz,zxcfsz,zxcspd){ this.obj=zxcobj; if (zxcobj.style.position){ if (zxcobj.style.position='absolute'){ this.abs=[zxcobj.offsetLeft,zxcobj.offsetWidth]; } } this.ref='zxcoopct'+zxcOOPCnt++; window[this.ref]=this; this.minmax=[zxcssz,Math.min(zxcssz,zxcfsz),Math.max(zxcssz,zxcfsz),zxcspd,(zxcssz<zxcfsz)?-1:1]; this.to=null; } zxcOOPTxtZoom.prototype.cngtxt=function(){ if ((this.minmax[4]>0&&this.minmax[0]<this.minmax[2])||(this.minmax[4]<0&&this.minmax[0]>this.minmax[1])){ this.obj.style.fontSize=(this.minmax[0]+=this.minmax[4])+'px'; if (this.abs){ this.obj.parentNode.style.width=(this.obj.offsetWidth+parseInt(this.obj.style.fontSize))+'px'; this.obj.parentNode.style.left=(parseInt(this.obj.style.fontSize)/2)+'px'; } this.to=this.setTimeOut('cngtxt();',this.minmax[3]); } } zxcOOPTxtZoom.prototype.setTimeOut=function(zxcf,zxcd){ this.to=setTimeout('window.'+this.ref+'.'+zxcf,zxcd); } //--> </script>

Inserting your text:
<div style="position:relative;width:140px;height:100px;test-align:center;" > <div id="fred" style="position:absolute;left:0px;font-size:14px;background-color:transparent;" onclick="zxcZoomText(this,14,20,500);" > TEXT<br> TEXT<br> TEXT<br> TEXT<br>