function CheckForm(){
var autErr=document.getElementById("mustAutor");
var commErr=document.getElementById("mustComment");
var aut=document.getElementById("autor");
var comm=document.getElementById("comment");
var dType=document.all?"block":"table-row";
if(aut){
	if(aut.value==""){
		autErr.style.display=dType;
		return false;
		} else {
			autErr.style.display="none";
		}
} else {
		autErr.style.display=dType;
		return false;
}
if(comm){
		if(comm.value==""){
			commErr.style.display=dType;
			return false;
		} else {
			commErr.style.display="none";
		}
} else {
		commErr.style.display=dType;
		return false;
}

return true;
}