function trim(txtObj)
	{
		// trim leading spaces
		while(''+txtObj.value.charAt(0)==' ')
			txtObj.value=txtObj.value.substring(1,txtObj.value.length);		
			
		// trim trailing spaces
		while(''+txtObj.value.charAt(txtObj.value.length-1)==' ')
			txtObj.value=txtObj.value.substring(0,txtObj.value.length-1);
			
		return 	txtObj.value;
	}


	function vldguest(seckey){


	
	   if (trim(document.forms[0].name) == ""){
	   	 alert("Please enter your name");
		 document.forms[0].name.focus();
		 return;
	   }
	   
	   if (trim(document.forms[0].comments) == ""){
	   	alert("Please enter your comments");
		return;
	   }
	   if (document.forms[0].comments.length > 1000){
	   	alert("Please limit your comments to 1000 character");
		return;
	   }

	   if (trim(document.forms[0].seckey) != seckey)
	   {
		alert("Please enter a valid security key");
		window.location = 'guestbook.php';
		return;
	    }
	   document.forms[0].submit();
	
	}