/**
	* limit character input in a textarea
	* domax is the maximum characters allowed
	* doct is the id of the element displaying how many characters are left
	* dobox is the id of the textarea
	**/
function docheck0(dobox, domax, doct) {
	var l1 = document.getElementById(doct);
	var fs = document.getElementById(dobox);
	var c = eval(fs.value.length);
	var dif = eval(c - domax);
	var value = fs.value.substr(0, c - dif);
	fs.value = value;
	l1.value = eval(domax - c);
}

function doleft0(dobox, domax, doct) {
	var l1 = document.getElementById(doct);
	var fs = document.getElementById(dobox);
	var total = eval(domax);
	var c = eval(fs.value.length);
	var isleft = eval(total - c);
	if(isleft <= "-1") {
		var dif = eval(c - domax);
		var value = fs.value.substr(0, c - dif);
		fs.value = value;
		isleft = "0";
	}
	l1.value = isleft;
}

function dostart(dobox, domax, doct) {
	var l1 = document.getElementById(doct);
	var fs = document.getElementById(dobox);
	var c = eval(fs.value.length);
	var dif = eval(domax-c);
	l1.value = dif;
}