function checkfeedback(fname)
{
	var error = "";	
	if((error = checkValidCharString(fname.cname.value,'Name',1,30)) != ""){
		alert(error);
		return false;
	}
	
	if((error = checkEmail(fname.cemail.value,'Email')) != ""){
		alert(error);
		return false;
	}
	
	if((error = checkValidCharString(fname.caddress.value,'Address',0,100)) != ""){
		alert(error);
		return false;
	}
	
	if((error = checkValidCharString(fname.csubject.value,'Subject',1,30)) != ""){
		alert(error);
		return false;
	}
	return true;
}