function check1()
{
  if(!validstr(document.logon.l_name)) return false ;
	if(document.logon.pwd.value.length<1)	
	{
		alert("密码不能为空") ;
		document.logon.pwd.focus() ;
		return false;
	}
	return true;
}

function validstr(str)
{
  var s,i,j;

  if (str.value.length <1)
  {
	alert("请输入您的用户名");
	str.focus();
    return false;
  }
  s=" +=|'#&<>%*`^/\\\";,.";
  str1=str.value.toString();
  for (i=0; i<str1.length; i++)
  {
	for(j=0;j<s.length;j++)
	{
	  if (str1.charAt(i) == s.charAt(j))
      {
		alert("用户名中不能包含特殊字符: +=|'#&<>%*`^/\\\";,.空格");
 		str.focus();
    return false;
   	  }
	}
  }
  return true;
}
function getcolor(x)
{
 try 
 {x=x.split("?");
 	x=x[0];	
  x=x.split("/");
  x=x[x.length-1];
  x=x.split(".");
  x=x[0];
  x=x.split("_");
  if(x[0].length<1) x[0]="index";
  if(typeof eval(x[0])=="undefined") return;
  $(x[0]).className="menu_cur";
 }
 catch(e)
 {return;}
}

function nTabs(thisObj,Num){
if(thisObj.className == "active")return;
var tabObj = thisObj.parentNode.id;
var tabList = document.getElementById(tabObj).getElementsByTagName("li");
for(i=0; i <tabList.length; i++)
{
  if (i == Num)
  {
   thisObj.className = "active"; 
      document.getElementById(tabObj+"_Content"+i).style.display = "block";
  }else{
   tabList[i].className = "normal"; 
   document.getElementById(tabObj+"_Content"+i).style.display = "none";
  }
} 
}

function getbyid(id) {
	if (document.getElementById) {
		return document.getElementById(id);
	} else if (document.all) {
		return document.all[id];
	} else if (document.layers) {
		return document.layers[id];
	} else {
		return null;
	}
}

function $(id) {
	return document.getElementById(id);
}

var isIE = navigator.userAgent.toLowerCase().indexOf('ie');
var userAgent = navigator.userAgent.toLowerCase();
var is_opera = userAgent.indexOf('opera') != -1 && opera.version();
var is_moz = (navigator.product == 'Gecko') && userAgent.substr(userAgent.indexOf('firefox') + 8, 3);
var is_ie = (userAgent.indexOf('msie') != -1 && !is_opera) && userAgent.substr(userAgent.indexOf('msie') + 5, 3);
var is_safari = (userAgent.indexOf('webkit') != -1 || userAgent.indexOf('safari') != -1);