function show(id,num,v)
{
  if(num==1)
  {
	 if(document.getElementById(id).value==v)
	 {
	  $("#"+id).css("color","#000000");
	  document.getElementById(id).value=""; 
	 }
	 else
	 {
	  $("#"+id).css("color","#000000");
	 }
  }
  else
  {
	 if(document.getElementById(id).value!="")
	 {
	
	  $("#"+id).css("color","#000000"); 
	 }
	 else
	 { 
	   document.getElementById(id).value=v; 
	   $("#"+id).css("color","#9f9f9f");
		
	 }
  }
}

function setHomePage(obj){ 
var aUrls=document.URL.split("/"); 
var vDomainName="http://www.nne.com.cn/"; 
try{//IE 
obj.style.behavior="url(#default#homepage)"; 
obj.setHomePage(vDomainName); 
}catch(e){//other 
if(window.netscape) {//ff 
try { 
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); 
} 
catch (e) { 
  alert("此操作被浏览器拒绝！/n请在浏览器地址栏输入'about:config'并回车/n然后将[signed.applets.codebase_principal_support]设置为'true'"); 
} 
var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch); 
prefs.setCharPref('browser.startup.homepage',vDomainName); 
} 
} 
if(window.netscape)alert("ff"); 
} 
function addFavorite(){ 
var aUrls=document.URL.split("/"); 
var vDomainName="http://"+aUrls[2]+"/"; 
var description=document.title; 
try{//IE 
window.external.AddFavorite(vDomainName,description); 
}catch(e){//FF 
window.sidebar.addPanel(description,vDomainName,""); 
} 
}