// JavaScript Document

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_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_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];}
}

//去掉字符串头部和尾部的空格
String.prototype.trim=function()
{
    //   用正则表达式将前后空格   
    //   用空字符串替代。   
    return this.replace(/(^\s*)|(\s*$)/g,"");   
}

//判断是否IE浏览器
function isIE(){ //ie?
   if (window.navigator.userAgent.toLowerCase().indexOf("msie")>=1)
    return true;
   else
    return false;
}

//innerText的firefox修正
if(!isIE()){ //firefox innerText define
   HTMLElement.prototype.__defineGetter__(     "innerText",
    function(){
     var anyString = "";
     var childS = this.childNodes;
     for(var i=0; i<childS.length; i++) {
      if(childS[i].nodeType==1)
       anyString += childS[i].tagName=="BR" ? '\n' : childS[i].innerText;
      else if(childS[i].nodeType==3)
       anyString += childS[i].nodeValue;
     }
     return anyString;
    }
   );
   HTMLElement.prototype.__defineSetter__(     "innerText",
    function(sText){
     this.textContent=sText;
    }
   );
}

//重新获取验证码
function changeCode(objName)
{
	var obj=MM_findObj(objName);
	if(obj!=null)
	{
		var d = new Date();
		obj.src="code.asp?s="+d.getTime();
	}
}

//判断email格式是否正确
function checkEmail(strEmail)
{
	if(strEmail.value.trim().indexOf('@')=="-1"||strEmail.value.trim().indexOf('.')=="-1")
	{
		return false;
	}
	else
		return true;
}

//检查后台用户登录表单
function checkLogin(theform)
{
	if(theform.username.value=="")
	{
		alert("请填写用户名！");
		theform.username.focus();
		return false;
	}
	if(theform.password.value=="")
	{
		alert("请填写密码！");
		theform.password.focus();
		return false;
	}
	if(theform.code.value=="")
	{
		alert("请填写验证码！");
		theform.code.focus();
		return false;
	}
}

//菜单
function menuxs(i){

	if(i!=null){
	document.getElementById(i).className="left_4";}
	
}
function menuyc(i){

	if(i!=null){
	document.getElementById(i).className="left_3";}
	
}