function checkDearForm(frm)
{
	var err="";
	if (ValidatorTrim(frm.clsdear_letter.value)=="") err+="Letter subject is required field. \n";
	if (ValidatorTrim(frm.clsdear_lettersubject.value)=="") err+="Letter is required field.\n";
	if(frm.clsdear_usernametype[1].checked)
	{
		if (ValidatorTrim(frm.clsdear_alternatename.value)=="") err+="Altername is required field.";
	}
	if (err!="") 
	{
		alert(err);
		return false;
	}
	else
	{
		frm.clsdear_hdnsubmited.value = 1;
		frm.clsdear_hdnaction.value = "SaveMessage";
		return true;
	}
}
function showAlternate()
{
	var frm = document.dearform;
	if(frm.clsdear_usernametype[1].checked)
		document.getElementById('alternate_name').style.display = "block";
	if(frm.clsdear_usernametype[0].checked)
		document.getElementById('alternate_name').style.display = "none";
}