Remove Items and Item Tooltips

guys help me with these script, i tried making Tooltips for my items in this inventory system ive made but it doesnt show up, or shows up but not in a way i wanted it to be, also OnGUI doesnt support on LostFocus on a certain GUI Element, i would've wanted to implement those for item removal since i cant think of other ways to do it..

 var itemArray:Texture[] = new Texture[16];
 var itmNm:String[]  = new String[16];
 var itmDes:String[] = new String[16];
 
 var bagCapacity:int = 16;
 
 var bag:Rect;
 
 var ScrollPosition:Vector2 = Vector2.zero;
 
 var dcString:String;
 var dsString:String;
 var cString:String;
 var sString:String;
 
 var cmTex:Texture2D;
 var smTex:Texture2D;
 var dmTex:Texture2D;
 
 var mX:float;
 var mY:float;
 var msX:int =32;
 var msY:int =32;
 var page:int=0;
 
 var cPage:String[] = ["Equipments","Items","Misc"];
 var toggleRemove:boolean = false;
 var toggleBag:boolean = false;
 var lostFocus:boolean = false;
 
 function Start(){
     cmTex = dmTex;
 }
 
 function Update()
 {
     if(Input.GetKeyDown("i"))
     {
        Togglebag();
     }
 }
 
 function OnGUI()
 {
     mX = Input.mousePosition.x;
     mY = Input.mousePosition.y;
     GUI.DrawTexture(Rect((mX-msX/2),((Screen.height-mY)-msY/2+msY/2),msX,msY),cmTex);
 
     if(toggleBag)
     {
         bag = GUI.Window(0,bag,bagWindow,cPage[page],"Box");
         GUI.depth = 0;
     }
 }
 
 function bagWindow(id:int)
 {   
     GUI.BeginGroup(Rect(0,0,34,165));
     if(GUI.Button(Rect(8,20,32,32),"B")){page = 0;}//main inventory for equipments
     if(GUI.Button(Rect(8,55,32,32),"C")){page =1;}//items and consumables
     if(GUI.Button(Rect(8,90,32,32),"D")){page =2;}//quest items and stuff..
     GUI.EndGroup();
 
     switch(page)
     {
        case 0:
             ScrollPosition = GUI.BeginScrollView(Rect(35,20,115,215),ScrollPosition,Rect(0,0,0,430));
             EquipmentGrid();
             GUI.EndScrollView();
             break;
        case 1:
             ScrollPosition = GUI.BeginScrollView(Rect(35,20,115,215),ScrollPosition,Rect(0,0,0,275));
             //ItemGrid(); for consumables function
             GUI.EndScrollView(); 
             break;
        case 2:
             ScrollPosition = GUI.BeginScrollView(Rect(35,20,115,215),ScrollPosition,Rect(0,0,0,275));
             //MiscGrid(); quest items function
             GUI.EndScrollView();
             break;
     }
     GUI.Label(Rect(5,230,120,25),"Gold:");
     GUI.DragWindow();
 }
 function EquipmentGrid()
 {
     for (var i=0;i<itemArray.Length;i++)
     { 
       if(GUI.Button(Rect(0,0+i*(25+2),100,25),GUIContent(itmNm[i],itemArray[i],itmDes[i]),"Box"))
        {
         if((itemArray[i]!= null)&&(Event.current.button == 0)&& toggleRemove == false)
         {
                useItem();
         }
         else if(Event.current.button == 1 && itemArray[i]!= null && toggleRemove ==false)
         {
             toggleRemove = true;
             cString = itmNm[i];
             sString = itmNm[i];
             cmTex = itemArray[i];
             smTex = itemArray[i];
             dcString = itmDes[i];
             dsString = itmDes[i];
             itemArray[i]=null;
             itmNm[i] = null;
             itmDes[i] = null;
         }
         else if((itemArray[i]== null)&&(Event.current.button == 0)&&toggleRemove == true)
         {   
             itemArray[i] = cmTex;
             itmNm[i] = cString;
             itmDes[i] =dcString;
             cmTex = dmTex;
             smTex = null;
             sString = null;
             dcString = null;
             toggleRemove = false;
         }
         else if((itemArray[i]!=null)&&(Event.current.button==0)&&toggleRemove == true)
         {
             smTex = itemArray[i];  //Stored Texture = Texture Array [i]
             itemArray[i] = cmTex;  //Texture Array [i] get current Texture
             cmTex = smTex;        //set current Texture to stored Texture
 
             sString = itmNm[i];    //Stored String = Equipment Description[i]
             itmNm[i] = cString;    //Equipment = current String
             cString = sString;     //current String = stored String
 
             dsString = itmDes[i];
             itmDes[i] = dsString;
             dcString = dsString; 
         }
             Debug.Log(toggleRemove);
        }
      }
 }
 
 function useItem()
 {
     Debug.Log("use functionality in imageArray[i]");
 }
 
 function Togglebag()
 {
     if(toggleBag)
     {
        toggleBag = false;
     }else{
        toggleBag = true;
     }
 }

thanks in advance :D