WebBrowser Javascript error

this.SaveMap = function(){
	
		var NameMap = [];
		NameMap.push(List[0][0]);
		
		for(var i = 0; i < List.length ; i++)
		{
			for(var j = 0; j < NameMap.length; j++)
			{
				if(NameMap[j] != List[i][0])//Here is problem
				{
					NameMap.push(List[i][0]);
					break;
				}
			}
		}
		return NameMap;
	}

public void LoadScript(string path)
       {
           HtmlDocument doc = web.Document;
           HtmlElement head = doc.GetElementsByTagName("head")[0];
           HtmlElement s = doc.CreateElement("script");

           HtmlElement headElement = web.Document.GetElementsByTagName("head")[0];
           HtmlElement scriptElement = web.Document.CreateElement("script");
           IHTMLScriptElement element = (IHTMLScriptElement)scriptElement.DomElement;

           JSpath = path;

           try
           {
               using (StreamReader JS = new StreamReader(path))
               {
                   string buff = JS.ReadToEnd();

                   element.text = buff;
                   headElement.AppendChild(scriptElement);
               }
           }