function Trim(str){
  str = str.replace(/[ \t]/g,"");
//alert (str)
 return str;
}
/*
function check_url(checktext){
   var linkStr=checktext.value;
   var linkPat=/^(http(s)?:\\/\\/)/;
   if (!linkPat.exec(linkStr)){
	alert(\"请以 http(s):// 开始\");
	checktext.focus();   
 	return false;
   }
   return true;
}
*/
function isEmpty(field,errMsg){
//alert (field.name) 
with (field)
lname = Trim(value)
if( field == null || lname ==""){
  if (errMsg == null || errMsg =="") 
  {
    alert("输入为空!")
  }else
    alert (errMsg)
  field.focus()
  return false
}else{
  //value=lname
  return lname
}
}

function validate_email(field,alerttxt)
{
 chkmail = isEmpty(field,"邮件地址为空！")
// alert("after check empty"+ chkmail)
 if( chkmail ==false ){
   return false
 }
 with (field)
 {
    apos=chkmail.indexOf("@")
    dotpos=chkmail.lastIndexOf(".")
    if (apos<1||dotpos-apos<2 ||dotpos == chkmail.length-1 ) 
     { alert(alerttxt)
       field.focus()
       return false}
    else { return chkmail}
 }
}

function setCookie(c_name,value,expiredays)
{
try{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
var expday=(expiredays==null) ? "" : ";expires=" + exdate.toString()
document.cookie = c_name+ "=" + escape(value) + expday
}catch (err){
  alert( err.description)
}

}

function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return ""
}


function delCookie( name ) {

if ( getCookie( name ) ) 
document.cookie = name + '=' +
( ( domain ) ? ';domain=' + domain : '' ) +';expires=Thu, 01-Jan-1970 00:00:01 GMT';

} 

function fillit(name,cname){
  var x=document.getElementsByName(name);
  uvalue = getCookie(cname)
  x[0].value=uvalue
}

function chkedbox(i,chk){
try{
var str=chk + "[" +i+ "]"

var chkbox=document.getElementsByName(str)
if(chkbox[0].checked == true)
  chkbox[0].checked=false
else
  chkbox[0].checked=true
}catch(err){
alert(err.description)
}
}