longhua.js

一个简易的网上购物系统。具有普遍的购物功能。还有一个小型的论坛

 /*
  showMsg()函数主要用来当客户注册时，显示提示
  hideMsg()函数主要用来隐藏注册提示的，
  而函数checkUserRegName()主要是用来检查客户的账号是否已经被占用
*/
function showMsg(showId){
  if(showId =='userRegMsg_Name'){
   document.getElementById(showId).outerHTML="<span class='userRegHint' id='userRegMsg_Name'>注册帐号（只支持数字和字母,如:love,love520）<span class='hint-pointer'></span></span>";
  }else{
   document.getElementById(showId).outerHTML="<span class='userRegHint' id='userRegMsg_Mail'>请输入密码,请最少输入最少6位最多12位密码<span class='hint-pointer'></span></span>";
  }
  
  document.getElementById(showId).style.display="inline"
}

function hideMsg(textId,showId){
  document.getElementById(showId).style.display="none";
  checkUserName(textId,showId);
}
 
  var xhr=false;

 function createxhr(){
     if(window.XMLHttpRequest){
        xhr=new XMLHttpRequest();
     }
     else if(window.ActiveXObject){
      try{
         xhr=new ActiveXObject("Msxml2.XMLHTTP");
       }catch(e){
         try{
             xhr=new ActiveXObject("Microsoft.XMLHTTP");
          }catch(e){}
         }
       }
    }  
  function send(url,showId){
    createxhr();
    xhr.open("post",url);
    xhr.onreadystatechange=function(){callback(showId);}
    xhr.setRequestHeader=("Content-Type","application/x-www-form-urlencoded");
    xhr.send(null);

  }
  function callback(showId){
    if(xhr.readyState==4){
      if(xhr.status==200){
        if(xhr.responseText=="nameNotReg")
            document.getElementById(showId).outerHTML="<image id='userRegMsg_Name' src='images/check_right.gif'>";
        else if(xhr.responseText=="mailNotReg")
           document.getElementById(showId).outerHTML="<image id='userRegMsg_Mail' src='images/check_right.gif'>";
         else if(xhr.responseText=="nameReg")
           document.getElementById(showId).outerHTML="<image id='userRegMsg_Name' src='images/check_error.gif'>";
         else 
           document.getElementById(showId).outerHTML="<image id='userRegMsg_Mail' src='images/check_error.gif'>";
      }
    
    }
  }



function checkUserName(textId,showId){
  
  if(document.getElementById(textId).value =="" || document.getElementById(textId).value.length==0){
    if(showId =='userRegMsg_Name'){
     document.getElementById(showId).outerHTML="<image id='userRegMsg_Name' src='images/check_error.gif'>";
    }else{
     document.getElementById(showId).outerHTML="<image id='userRegMsg_Mail' src='images/check_error.gif'>";
    }
    return ;
   }
    if(showId =='userRegMsg_Name'){
     document.getElementById(showId).outerHTML="<span id='userRegMsg_Name'>检测中,请等待...</span>";
     var url = "/longHua/checkUserReg.do?method=checkUserRegName&userName=" + document.getElementById(textId).value;
     send(url,showId);
    }else{
     document.getElementById(showId).outerHTML="<span id='userRegMsg_Mail'>检测中,请等待...</span>";
     var url = "/longHua/checkUserReg.do?method=checkUserRegMail&userMail=" + document.getElementById(textId).value;
     send(url,showId)
    }
  }