Character Counter OnLoad

[unemployed]

How can I make my character counter display how many characters are left on page load. Right now it only displayed the number of characters left when I user keysup, keysdown or onblurs.

[HIGHLIGHT="JavaScript"]
var companydo = document.getElementById('cscompanydo');

function validate_companydo_field_length() {
var len = companydo.value.length;
var mc = 2000;
if (len > mc) {
companydo.value = companydo.value.substring(0,mc);
len = mc;
}
document.getElementById('doremaining').innerHTML = mc - len;
}

companydo.onkeyup = validate_companydo_field_length;
companydo.onkeydown = validate_companydo_field_length;
companydo.onblur = validate_companydo_field_length;
[/HIGHLIGHT]

[HIGHLIGHT="HTML4Strict"]
<textarea class="medium mediumwidth man" id="cscompanydo" name="companydo" rows="" cols=""><?php echo $answer['companydo']; ?></textarea>
<div class="f_right mts mrs"><span id="doremaining" class="mrs">2000</span>characters remaining</div>
[/HIGHLIGHT]

[JMRKER]

If you are asking about a progress bar to display how long until load is finished,
I don't believe JS can acquire this information.