// JScript 文件
// Create a cookie with the specified name and value.
// The cookie expires at the end of the 20th century.
function SetCookie(sName, sValue)
{        
    var date = new Date();
    date.setMinutes(date.getMinutes() + 20);
    document.cookie = sName + "=" + escape(sValue) + "; expires=" + date.toUTCString();
}

// Retrieve the value of the cookie with the specified name.
function GetCookie(sName)
{
    // cookies are separated by semicolons
    var aCookie = document.cookie.split("; ");
    for (var i=0; i < aCookie.length; i++)
    {
        // a name/value pair (a crumb) is separated by an equal sign
        var aCrumb = aCookie[i].split("=");
        if (sName == aCrumb[0])
        return unescape(aCrumb[1]);
    }
    
    // a cookie with the requested name does not exist
    return null;
}

// Delete the cookie with the specified name.
function DelCookie(sName)
{
    document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}

/////文档对象模型
function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1) 
      return element;

    elements.push(element);
  }

  return elements;
}


/////选择搜索对象．．
 function changeSearchObject(obj)
{
    document.getElementById("procurement").style.backgroundImage ="url(images/bt_search_02.gif)";
    document.getElementById("product").style.backgroundImage ="url(images/bt_search_02.gif)";
    document.getElementById("company").style.backgroundImage ="url(images/bt_search_02.gif)";
    document.getElementById("ad").style.backgroundImage ="url(images/bt_search_02.gif)";        
    document.getElementById(obj).style.backgroundImage="url(images/bt_search_01.gif)";    
    SetCookie("searchObject",obj);
}

function getSearchObject()
{
  var searchObject = GetCookie("searchObject");
  switch(searchObject)
  {
    case "procurement":
        document.getElementById("procurement").style.backgroundImage ="url(images/bt_search_01.gif)";
       break;
    case "product":
        document.getElementById("product").style.backgroundImage ="url(images/bt_search_01.gif)";
       break;
    case "company":
        document.getElementById("company").style.backgroundImage ="url(images/bt_search_01.gif)";
       break;
    case "ad":
        document.getElementById("ad").style.backgroundImage ="url(images/bt_search_01.gif)";
       break;
  }
}

function bodyOnload()
{
    getSearchObject();
}