     #*  output: return true if selected status has been set, otherwise return false.
     #
     setChoice = (objId, val) ->
-      Obj = document.getElementById(objId)
-      idx = -1
-      i = 0
-      while i < Obj.options.length
-        if Obj.options[i].value is val
-          idx = i
-          break
-        i++
-      if idx >= 0
-        
-        #setting option's selected status 
-        Obj.options[idx].selected = true
-        
-        #update the following select menu 
-        fillOptions objId
-      else
-        Obj.options[0].selected = true
-        fillOptions objId
+        Obj = document.getElementById(objId)
+        idx = -1
+        i = 0
+        while i < Obj.options.length
+            if Obj.options[i].value is val
+                idx = i
+                break
+            i++
+        if idx >= 0
+            
+            #setting option's selected status 
+            Obj.options[idx].selected = true
+            
+            #update the following select menu 
+            fillOptions objId
+        else
+            Obj.options[0].selected = true
+            fillOptions objId
     
     # setting option's selected status based on default setting or cookie setting for Species, Group, Type and Database select menu in the main search page http://www.genenetwork.org/
     updateChocie = (selectObjId) ->
-      if selectObjId is "species"
-        defaultSpecies = getDefaultValue("species")
-        
-        #setting option's selected status
-        setChoice "species", defaultSpecies
-      else if selectObjId is "cross"
-        defaultSet = getDefaultValue("cross")
-        
-        #setting option's selected status
-        setChoice "cross", defaultSet
-      else if selectObjId is "tissue"
-        defaultType = getDefaultValue("tissue")
-        
-        #setting option's selected status
-        setChoice "tissue", defaultType
-      else if selectObjId is "database"
-        defaultDB = getDefaultValue("database")
-        
-        #setting option's selected status
-        setChoice "database", defaultDB
+        if selectObjId is "species"
+            defaultSpecies = getDefaultValue("species")
+            
+            #setting option's selected status
+            setChoice "species", defaultSpecies
+        else if selectObjId is "cross"
+            defaultSet = getDefaultValue("cross")
+            
+            #setting option's selected status
+            setChoice "cross", defaultSet
+        else if selectObjId is "tissue"
+            defaultType = getDefaultValue("tissue")
+            
+            #setting option's selected status
+            setChoice "tissue", defaultType
+        else if selectObjId is "database"
+            defaultDB = getDefaultValue("database")
+            
+            #setting option's selected status
+            setChoice "database", defaultDB
     
     #get default value;if cookie exists, then use cookie value, otherwise use default value
     getDefaultValue = (selectObjId) ->
-      
-      #define default value
-      defaultSpecies = "mouse"
-      defaultSet = "BXD"
-      defaultType = "Hippocampus"
-      defaultDB = "HC_M2_0606_P"
-      if selectObjId is "species"
         
-        #if cookie exists, then use cookie value, otherwise use default value
-        cookieSpecies = getCookie("defaultSpecies")
-        defaultSpecies = cookieSpecies  if cookieSpecies
-        defaultSpecies
-      else if selectObjId is "cross"
-        cookieSet = getCookie("defaultSet")
-        defaultSet = cookieSet  if cookieSet
-        defaultSet
-      else if selectObjId is "tissue"
-        cookieType = getCookie("defaultType")
-        defaultType = cookieType  if cookieType
-        defaultType
-      else if selectObjId is "database"
-        cookieDB = getCookie("defaultDB")
-        defaultDB = cookieDB  if cookieDB
-        defaultDB
+        #define default value
+        defaultSpecies = "mouse"
+        defaultSet = "BXD"
+        defaultType = "Hippocampus"
+        defaultDB = "HC_M2_0606_P"
+        if selectObjId is "species"
+            
+            #if cookie exists, then use cookie value, otherwise use default value
+            cookieSpecies = getCookie("defaultSpecies")
+            defaultSpecies = cookieSpecies  if cookieSpecies
+            defaultSpecies
+        else if selectObjId is "cross"
+            cookieSet = getCookie("defaultSet")
+            defaultSet = cookieSet  if cookieSet
+            defaultSet
+        else if selectObjId is "tissue"
+            cookieType = getCookie("defaultType")
+            defaultType = cookieType  if cookieType
+            defaultType
+        else if selectObjId is "database"
+            cookieDB = getCookie("defaultDB")
+            defaultDB = cookieDB  if cookieDB
+            defaultDB
     
     #setting default value into cookies for the dropdown menus: Species,Group, Type, and Database 
     setDefault = (thisform) ->
-      setCookie "cookieTest", "cookieTest", 1
-      cookieTest = getCookie("cookieTest")
-      delCookie "cookieTest"
-      if cookieTest
-        defaultSpecies = thisform.species.value
-        setCookie "defaultSpecies", defaultSpecies, 10
-        defaultSet = thisform.cross.value
-        setCookie "defaultSet", defaultSet, 10
-        defaultType = thisform.tissue.value
-        setCookie "defaultType", defaultType, 10
-        defaultDB = thisform.database.value
-        setCookie "defaultDB", defaultDB, 10
-        updateChocie "species"
-        updateChocie "cross"
-        updateChocie "tissue"
-        updateChocie "database"
-        alert "The current settings are now your default"
-      else
-        alert "You need to enable Cookies in your browser."
-        
+        setCookie "cookieTest", "cookieTest", 1
+        cookieTest = getCookie("cookieTest")
+        delCookie "cookieTest"
+        if cookieTest
+            defaultSpecies = thisform.species.value
+            setCookie "defaultSpecies", defaultSpecies, 10
+            defaultSet = thisform.cross.value
+            setCookie "defaultSet", defaultSet, 10
+            defaultType = thisform.tissue.value
+            setCookie "defaultType", defaultType, 10
+            defaultDB = thisform.database.value
+            setCookie "defaultDB", defaultDB, 10
+            updateChocie "species"
+            updateChocie "cross"
+            updateChocie "tissue"
+            updateChocie "database"
+            alert "The current settings are now your default"
+        else
+            alert "You need to enable Cookies in your browser."
+            
     # run it
     initialDatasetSelection()
    #* output: null
    #
    removeOptions = (selectObj) ->
      selectObj = document.getElementById(selectObj)  unless typeof selectObj is "object"
      len = selectObj.options.length
      i = 0
    
      while i < len
        
        # clear current selection       
        selectObj.options[0] = null
        i++
    
    # 
    #*  input: selectObjId (designated select menu, such as species, cross, etc... )

    #*  output: null
    #
    fillOptions = (selectObjId) ->
        unless selectObjId?
            speciesObj = document.getElementById("species")
            len = sArr.length
            i = 1
    
            while i < len
                
                # setting Species' option
                speciesObj.options[i - 1] = new Option(sArr[i].txt, sArr[i].val)
                i++
            updateChocie "species"
        else if selectObjId is "species"
            speciesObj = document.getElementById("species")
            groupObj = document.getElementById("cross")
            len = lArr.length
            arr = []
            idx = 0
            i = 1
    
            while i < len
                
                #get group(cross) info from lArr
                arr[idx++] = lArr[i][1]  if lArr[i][0] is (getIndexByValue("species", speciesObj.value)).toString() and not Contains(arr, lArr[i][1])
                i++
            idx = 0
            len = arr.length
            removeOptions "cross"
            i = 0
    
            while i < len
                
                # setting Group's option
                groupObj.options[idx++] = new Option(gArr[arr[i]].txt, gArr[arr[i]].val)
                i++
            updateChocie "cross"
        else if selectObjId is "cross"
            speciesObj = document.getElementById("species")
            groupObj = document.getElementById("cross")
            typeObj = document.getElementById("tissue")
            len = lArr.length
            arr = []
            idx = 0
            i = 1
    
            while i < len
                
                #get type(tissue) info from lArr
                arr[idx++] = lArr[i][2]  if lArr[i][0] is (getIndexByValue("species", speciesObj.value)).toString() and lArr[i][1] is (getIndexByValue("cross", groupObj.value)).toString() and not Contains(arr, lArr[i][2])
                i++
            idx = 0
            len = arr.length
            removeOptions "tissue"
            i = 0
    
            while i < len
                
                # setting Type's option
                typeObj.options[idx++] = new Option(tArr[arr[i]].txt, tArr[arr[i]].val)
                i++
            updateChocie "tissue"
        else if selectObjId is "tissue"
            speciesObj = document.getElementById("species")
            groupObj = document.getElementById("cross")
            typeObj = document.getElementById("tissue")
            databaseObj = document.getElementById("database")
            len = lArr.length
            arr = []
            idx = 0
            i = 1
    
            while i < len
                
                #get dataset(database) info from lArr
                arr[idx++] = lArr[i][3]  if lArr[i][0] is (getIndexByValue("species", speciesObj.value)).toString() and lArr[i][1] is (getIndexByValue("cross", groupObj.value)).toString() and lArr[i][2] is (getIndexByValue("tissue", typeObj.value)).toString() and not Contains(arr, lArr[i][3])
                i++
            idx = 0
            len = arr.length
            removeOptions "database"
            i = 0
    
            while i < len
                
                # setting Database's option
                databaseObj.options[idx++] = new Option(dArr[arr[i]].txt, dArr[arr[i]].val)
                i++
            updateChocie "database"
    
    # 
    #*  input: arr (targeted array); obj (targeted value)
