//导航条
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//搜索
function CheckSearchKeyWord()
{
  if (document.SearchForm.SearchKeyWord.value=="" ||  document.SearchForm.SearchKeyWord.value=="请输入搜索关键词" )
  {
    alert("请输入搜索关键词！");
	document.SearchForm.SearchKeyWord.focus();
	return false;
  }
  return true;  
}

//发布留言
function CheckMsgForm()
{
  if (document.MsgForm.Author.value=="")
  {
    alert("请输入您的姓名！");
	document.MsgForm.Author.focus();
	return false;
  }
  if (document.MsgForm.Email.value=="")
  {
    alert("请输入您的邮箱！");
	document.MsgForm.Email.focus();
	return false;
  }
  if (document.MsgForm.ChkCode.value=="")
  {
    alert("请输入验证码！");
	document.MsgForm.ChkCode.focus();
	return false;
  }
  if (document.MsgForm.Content.value=="")
  {
    alert("请输入您的咨询内容！");
	document.MsgForm.Content.focus();
	return false;
  }  
  return true;  
}

//作品验证码
function CheckWorksForm()
{
  if (document.WorksForm.tcCode.value=="")
  {
    alert("请输入邀请码！");
	document.WorksForm.tcCode.focus();
	return false;
  }
  return true;  
}

//程序设计说明展示
function  turnit(str)
{

  if  (str.style.display=="none")  
    {str.style.display="";
}

  else
    {str.style.display="none";  
     
   }
}
function o(obj)
{
	return document.getElementById(obj)
}
function tn(id)
{
var obj=o("code_"+id)
turnit(obj)
}

//文本域focus
function myfocus() {
	var inputs = document.getElementsByTagName("input"),
	i = inputs.length;
	while (i--) {
		inputs[i].onfocus = function() {
			this.className += " focus";
		};
		inputs[i].onblur = function() {
			this.className = this.className.replace(" focus", "");
		};
	};
	var textareas = document.getElementsByTagName("textarea"),
	j = textareas.length;
	while (j--) {
		textareas[j].onfocus = function() {
			this.className += " focus";
		};
		textareas[j].onblur = function() {
			this.className = this.className.replace(" focus", "");
		};
	};	
};