function CheckMail()
{
var nm=trim(document.FormMail.username.value);
var pwd=trim(document.FormMail.password.value);
if(nm==""||pwd=="")
{
    alert("Please enter the user name or password ");
    return false;
 }
 return true;
}

function CheckSearch()
{
var wd=trim(document.FromSearch.wd.value);
if(wd=="")
{
    alert("Please enter the search word! ");
    return false;
 }
 return true;
}
function ResetFormMail()
{
 document.FormMail.reset();
 return false;
}
function ltrim(s){ 
return s.replace( /^\s*/, ""); 
}  
function rtrim(s){ 
return s.replace( /\s*$/, ""); 
}  
function trim(s){ 
return rtrim(ltrim(s)); 
}
function check()
{           
	if (document.guestbook.username.value=="")        
	{
		alert("Please enter the Name!");
		document.guestbook.username.focus();
		return false;
	}
	if (document.guestbook.addr.value=="")        
	{
		alert("Please enter the Address!");
		document.guestbook.addr.focus();
		return false;
	}
	if (document.guestbook.tel.value=="")        
	{
		alert("Please enter the Tel!");
		document.guestbook.tel.focus();
		return false;
	}
	if (document.guestbook.email.value=="")        
	{
		alert("Please enter the Email!");
		document.guestbook.email.focus();
		return false;
	}
	if (document.guestbook.title.value=="")                  
	{
		alert("Please Enter the title!");     
		document.guestbook.title.focus();
		return false;
	}
	if (document.guestbook.content.value=="") 
	{
		alert("Please enter the message content!");     
		document.guestbook.content.focus();
		return false;
	}
	return true;
}