Това е с проценти:
[js]<script type="text/JavaScript">
function textCounter(field,counter,maxlimit,linecounter) {
var fieldWidth = parseInt(field.offsetWidth);
var charcnt = field.value.length;
if (charcnt > maxlimit) {
field.value = field.value.substring(0, maxlimit);
}
else {
var percentage = parseInt(100 - (( maxlimit - charcnt) * 100)/maxlimit) ;
document.getElementById(counter).style.width = parseInt((fieldWidth*percentage)/100)+"px";
document.getElementById(counter).innerHTML="Лимит на полето: <b>"+percentage+"%</b>"
setcolor(document.getElementById(counter),percentage,"background-color");
}
}
function setcolor(obj,percentage,prop){
obj.style[prop] = "rgb(80%,"+(100-percentage)+"%,"+(100-percentage)+"%)";
}
</script>[/js]