var sms_max_length = 140;
var laenge = 0;

function CheckStr() {
	var textfield = document.getElementById('msg');
	var countfield = document.getElementById('sms_length');
	var chars = eval(sms_max_length - textfield.value.length);
	if ( chars != laenge )
			{
				countfield.innerHTML = chars;
			}
			laenge = chars;
}


function compress() {
	var textfeld = document.getElementById('msg');
	var words = textfeld.value.split(' ');
	text = textfeld.value;
	for(var i=0; i<words.length; i++) {
		words[i]=words[i].charAt(0).toUpperCase()+words[i].substr(1);
	}
	textfeld.value = words.join('');
	CheckStr();
	textfeld.setAttribute('readOnly','readOnly');
	document.getElementById('compress').innerHTML = '<a href="javascript:decompress();">SMS dekomprimieren</a>';
}

function decompress() {
		var textfeld = document.getElementById('msg');
		textfeld.value = text;
		textfeld.removeAttribute('readOnly');
		document.getElementById('compress').innerHTML = '<a href="javascript:compress();">SMS komprimieren</a>';
		CheckStr();
}