function chrleft() {
	var txt=document.getElementById('message').value;
	var cc=txt.length;
	var cs=80-cc;
	if (document.getElementById('message').value == "Message to Send") {
		document.getElementById('chrleft').innerHTML="80 characters left";
	} else if (cs < 0) {
		document.getElementById('chrleft').innerHTML="0 characters left";
		document.getElementById('message').value=document.getElementById('message').value.substring(0,80);
		//alert("Sorry, but text messages are a maximum of 80 characters long.");
	} else if (cs < 1) {
		document.getElementById('chrleft').innerHTML="0 characters left";
		tp = false;
	} else if (cs == 1) {
		document.getElementById('chrleft').innerHTML="1 character left";
	} else {
		tp=true;
		document.getElementById('chrleft').innerHTML=cs+" characters left";
	}
}