var maxLength;

function countLen(j) {

	if (j) maxLength = j;

	message_text    = document.sendsms.content.value;
	realLength      = 0;
	storeLength     = 0;
	storeRealLength = 0;

	for (i=0; i<message_text.length; i++) {
			if (maxLength>=realLength) {
				storeRealLength = realLength;
				storeLength = i;
			}

			if(message_text.substring(i,i+1) != "\x0d") {
				realLength++;
			}
	}

	if (realLength>maxLength) {
		realLength = storeRealLength;
		document.sendsms.content.value = message_text.substring(0,storeLength);
	}

	document.sendsms.content_length.value = document.sendsms.content.value.length + ' из ' + maxLength + ' символов';

}

function ch_text(t){

	document.sendsms.content.value = t;

	countLen();

}