function on(){
    if(document.getElementById("Emailto").value=="您的电子邮件地址"){
      document.getElementById("Emailto").value="";
    }
}

function over(){
    if(document.getElementById("Emailto").value==""){
      document.getElementById("Emailto").value="您的电子邮件地址";
    }
}

function checkmail(strd) {
  //  str = $().val();
    str =document.getElementById(strd).value;
    str = str.match(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/);
    if (str == null) {
       // alert("邮件无效");
        return false;
    }else{  
   return true;
    }

}



function changeSearch(heath_center){   
   var c=4;
    for(var i=1;i<=c;i++){
        if(i==heath_center){
            document.getElementById("nav_itema"+i).className="active1";
          // document.getElementById("nav_taba"+i).style.display="";
          document.getElementById("Stype").value=i;
        }
        else{
            document.getElementById("nav_itema"+i).className="";
          //  document.getElementById("nav_taba"+i).style.display="none";
        }  
}
}

function addMail(){
var email=document.getElementById("Emailto").value;
if(checkmail("Emailto")){
    $.ajax({
                    url: '../Ajax/addmail.ashx',
                    type: 'POST',
                    dataType:"json",
                    data: 'email=' + email,
                    success: function(a) {　
                       　alert(a.msg);
                    }
                })      

        }else{
          alert("你填写的email不正确");

        }
}

function subMail(){

var email=document.getElementById("Emailto").value;
if(checkmail("Emailto")){
    $.ajax({
                    url: '../Ajax/submail.ashx',
                    type: 'POST',
                    dataType:"json",
                    data: 'email=' + email,
                    success: function(a) {　
                       　alert(a.msg);
                    }
                })      

        }else{
          alert("你填写的email不正确");

        }

}



      document.onkeydown = function(e){ 
                    var key = window.event ? event.keyCode : e.which;                                         
                        if(key ==13 && $("#logok").val()=="1")
                            {
                              document.getElementById("head1_Button1").click();
                             
                            }
                          
                            if(key ==13 && $("#logok").val()=="2")
                            {
                              ulogin();
                              return false;
                            }
                            
                            if(key ==13 && $("#logok").val()=="4")
                            {
                             // ulogin();
                              smt();
                              return false;
                            }
                            
//                            if(key ==13 && $("#logok").val()=="3")
//                            {
//                              Loginx();
//                              return false;
//                            }
						  
                            
            }
            function xchange(id){
            
            $("#logok").val(id);
            }