function decimalonly(txtfield, e)
{
	var key;
	var keychar;
	
	if (window.event) { key = window.event.keyCode; }
	else if (e) { key = e.which; }
	else { return true; }
	   
	keychar = String.fromCharCode(key);		
	if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) ) {
	   return true;
	}
	else if ((("0123456789").indexOf(keychar) > -1)) {
	   return true;
	}
	else {
	   return false;
	}
}	

function limitsize(txtfield, e, limitNum)
{	
	var keycheck = decimalonly(txtfield, e);
	if (!keycheck)
	{
		return keycheck;
	}
	else if (txtfield.value.length >= limitNum) {
		return false;
	}
	else
	{
		return true;
	}
}