/**
 * SessionManager class
 */ 
 
 var SessionManager = {
 
 	_toggledFields : new Array(),
 
 	toggleField : function(field,defaultValue){
 		for(var i=0;i<SessionManager._toggledFields.length;i++) if(SessionManager._toggledFields[i] == field) return;
 	
 		if(field.value == defaultValue){
 			field.value = '';
 		}
 		
 		SessionManager._toggledFields[SessionManager._toggledFields.length] = field;
 	}
 }