var supportsKeys = false;

function calcCharLeft(f) {
 clipped = false;
 maxLength = 160;
 if (f.smsMessageBox.value.length > maxLength) 
 { 
	  f.smsMessageBox.value = f.smsMessageBox.value.substring(0,maxLength);
	  charleft = 0;
	  clipped = true;
 } 
 else 
 {
  	charleft = maxLength - f.smsMessageBox.value.length;
 }
 f.msgCL.value = charleft;
 return clipped;
}

function textKey(f) {
 supportsKeys = true;
 calcCharLeft(f);
  
}