Gmail Character count modification - http://the.hackerconundrum.com/2009/01/gmail-character-count.html

change.js

function iev(count) 
{ 
var ifs=$('iframe',g.getActiveViewElement()); 
var ifm; 
for(var i=0;i
{ 
if(!ifs[i].gcc_added) 
{ 
ifm=ifs[i].contentDocument; 
ifm.body.setAttribute('count_class','char_count'+count); 
ifm.count_class='char_count'+count; 
ifm.addEventListener('keyup',function() 
{ 
var spans=$('.'+this.body.getAttribute('count_class'),g.getActiveViewElement()); 
for(var i=spans.length-1;i>=0;i--) 
{ 
// start modified code 
current=this.body.textContent.length; 
spans[i].innerHTML='( '+first+' + '+(current-first)+' Characters )'; 
// end modified code 
}; 
return; 
},false); 
var spans=$('.char_count'+count,g.getActiveViewElement()); 
// start added code 
first=ifm.body.textContent.length; 
// end added code 
for(var i=spans.length-1;i>=0;i--) 
{ 
current=ifm.body.textContent.length; 
// start modified code 
spans[i].innerHTML='( '+first+' + 0 Characters )'; 
// end modified code 
}; 
ifs[i].gcc_added=true; 
return; 
} 
}; 
return; 
};