/* 
name : gnw.js 
author:amitrai01 
ver:1.0
*/
function wgnJSLib() {
    
    var doNext = function() {
        document.getElementById('obsData_'+glbWgnLocNumCur).style.display="none";
        
        if(glbWgnLocNumCur == glbWgnLocNum)
            glbWgnLocNumCur = 1;
        else
            glbWgnLocNumCur++;
            
        document.getElementById('obsData_'+glbWgnLocNumCur).style.display="block";
        
        return false;
    }
    
    var doPrev = function() {
        document.getElementById('obsData_'+glbWgnLocNumCur).style.display="none";
        
        if(glbWgnLocNumCur == 1)
            glbWgnLocNumCur = glbWgnLocNum;
        else
            glbWgnLocNumCur--;
            
        document.getElementById('obsData_'+glbWgnLocNumCur).style.display="block";
        
        return false;
    }   
  
    return {
        next : function() {
            return doNext();
        },
        
        prev : function(id) {
            return doPrev();
        }
    };
    //end return
} //end wgnJSLib

//instantiate lib
var wgnJSLibObj = new wgnJSLib();
//export common functions
var $wgnNext = wgnJSLibObj.next;
var $wgnPrev = wgnJSLibObj.prev;
var  glbWgnLocNumCur = 1;
document.getElementById('wgnNextBtn').onclick = $wgnNext;
document.getElementById('wgnPrevBtn').onclick = $wgnPrev;