科訊商業(yè)版中用到的ajax空間與分頁函數(shù)

更新時間：2007年09月02日 22:02:32 作者：

科訊sql商業(yè)版中用到的ajax空間與分頁函數(shù),他們的js代碼學習是非常不錯的
//ajax 控件
function PageAjax(){
    var xhrObj=null;
    if(window.XMLHttpRequest)
    {
    xhrObj=new XMLHttpRequest();
    }
    else if(window.ActiveXObject)
    {
    try{
    xhrObj=new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch(e1)
    {
    try{
    xhrObj=new ActiveXObject("MSXML2.XMLHTTP");
    }
    catch(e2){
    try{
    xhrObj=new ActiveXObject("MSXML3.XMLHTTP");
    }
    catch(e3){
    alert("創(chuàng)建Ajax失?。?+e3)
    }
    }
    }
    }
    else
    {
    alert("未能識別的瀏覽器");
    }
    return xhrObj;
}

function Page(curPage,labelid,classid,installdir,url,refreshtype,specialid)
   {
   this.labelid=labelid;
   this.classid=classid;
   this.url=url;
   if (labelid.substring(0,5)=="{SQL_")
   {
    var slabelid=labelid.split('(')[0];
    slabelid=slabelid.replace("{","");
    this.c_obj="c_"+slabelid;
    this.p_obj="p_"+slabelid;
   }
   else
   {
   this.c_obj="c_"+labelid;
   this.p_obj="p_"+labelid;
   }
   this.installdir=installdir;
   this.refreshtype=refreshtype;
   this.specialid=specialid;
   this.page=curPage;
   loadData(1);
   }
function loadData(p)
{  this.page=p;
   var xhr=new PageAjax();
   xhr.open("get",installdir+url+"?labelid="+escape(labelid)+"&classid="+classid+"&refreshtype="+refreshtype+"&specialid=" +specialid+"&curpage="+p,true);
   xhr.onreadystatechange=function (){
             if(xhr.readyState==1)
              {
                 if (p==1)
                eval('document.all.'+c_obj).innerHTML="<div align='center'><img src='"+installdir+"images/loading.gif'>正在連接服務器...</div>";
              }
              else if(xhr.readyState==2 || xhr.readyState==3)
              {
                if (p==1)
                eval('document.all.'+c_obj).innerHTML="<div align='center'><img src='"+installdir+"images/loading.gif'>正在讀取數(shù)據(jù)...</div>";
              }
              else if(xhr.readyState==4)
              {
             if (xhr.status==200)
             {
                  var pagearr=xhr.responseText.split("{ks:page}")
                  var pageparamarr=pagearr[1].split("|");
                  count=pageparamarr[0];
                  perpagenum=pageparamarr[1];
                  pagecount=pageparamarr[2];
                  itemunit=pageparamarr[3];
                  itemname=pageparamarr[4];
                  pagestyle=pageparamarr[5];
                  getObject(c_obj).innerHTML=pagearr[0];
                  pagelist();
             }
            }
       }
    xhr.send(null);
}
function getObject(id)
{
    if(document.getElementById)
    {
        return document.getElementById(id);
    }
    else if(document.all)
    {
        return document.all[id];
    }
    else if(document.layers)
    {
        return document.layers[id];
    }
}

function pagelist()
{
var n=1;
var statushtml=null;
switch(parseInt(this.pagestyle))
{
  case 1:
     statushtml="共"+this.count+this.itemunit+" <a href=\"javascript:homePage(1);\" title=\"首頁\">首頁</a> <a href=\"javascript:previousPage()\" title=\"上一頁\">上一頁</a> <a href=\"javascript:nextPage()\" title=\"下一頁\">下一頁</a> <a href=\"javascript:lastPage();\" title=\"最后一頁\">尾頁</a> 頁次:<font color=red>"+this.page+"</font>/"+this.pagecount+"頁 "+this.perpagenum+this.itemunit+this.itemname+"/頁";
        break;
  case 2:
     statushtml="<a href='#'>"+this.pagecount+"頁/"+this.count+this.itemunit+"</a> <a href=\"javascript:homePage(1);\" title=\"首頁\"><font face=webdings>9</font></a> <a href=\"javascript:previousPage()\" title=\"上一頁\"><font face=webdings>7</font></a> ";
     var startpage=1;
     if (this.page==10)
       startpage=2;
     else if(this.page>10)
       startpage=eval((parseInt(this.page/10)-1)*10+parseInt((this.page)%10)+2);
      for(var i=startpage;i<=this.pagecount;i++){
          if (i==this.page)
           statushtml+="<a href=\"#\"><font color=\"#ff0000\">"+i+"</font></a> "
          else
            statushtml+="<a href=\"javascript:turn("+i+")\">"+i+"</a> "
            n=n+1;
          if (n>10) break;
      }
     statushtml+="<a href=\"javascript:nextPage()\" title=\"下一頁\"><font face=webdings>8</font></a> <a href=\"javascript:lastPage();\" title=\"最后一頁\"><font face=webdings>:</font></a>";
     statushtml="<span class='kspage'>"+statushtml+"</span>";
    break;
  case 4:
     statushtml="共"+this.pagecount+"頁/"+this.count+this.itemunit+this.itemname+" <a href=\"javascript:homePage(1);\" title=\"首頁\"><font face=webdings>9</font></a> <a href=\"javascript:previousPage()\" title=\"上一頁\"><font face=webdings>7</font></a> ";
      for(var i=this.page;i<=this.pagecount;i++){
          if (i==this.page)
           statushtml+="<b><font color=\"#ff0000\">"+i+"</font></b> "
          else
            statushtml+="<a href=\"javascript:turn("+i+")\">["+i+"]</a> "
            n=n+1;
          if (n>10) break;
      }
     statushtml+="<a href=\"javascript:nextPage()\" title=\"下一頁\"><font face=webdings>8</font></a> <a href=\"javascript:lastPage();\" title=\"最后一頁\"><font face=webdings>:</font></a>";
    break;
  case 3:
     statushtml="第<font color=#ff000>"+this.page+"</font>頁共"+this.pagecount+"頁 <a href=\"javascript:homePage(1);\" title=\"首頁\"><<</a> <a href=\"javascript:previousPage()\" title=\"上一頁\"><</a> <a href=\"javascript:nextPage()\" title=\"下一頁\">></a> <a href=\"javascript:lastPage();\" title=\"最后一頁\">>></a> "+this.perpagenum+this.itemunit+this.itemname+"/頁";
   break;
}
     statushtml+=" 第<select name=\"goto\" onchange=\"turn(parseInt(this.value));\">";
      for(var i=1;i<=this.pagecount;i++){
         if (i==this.page)
         statushtml+="<option value='"+i+"' selected>"+i+"</option>";
         else
         statushtml+="<option value='"+i+"'>"+i+"</option>";
      }
     statushtml+="</select>頁";
     getObject(this.p_obj).innerHTML=statushtml;
}
function homePage()
{
   if(this.page==1)
    alert("已經(jīng)是首頁了！")
   else
   loadData(1);
}
function lastPage()
{
   if(this.page==this.pagecount)
    alert("已經(jīng)是最后一頁了！")
   else
   loadData(this.pagecount);
}
function previousPage()
{
   if (this.page>1)
      loadData(this.page-1);
   else
      alert("已經(jīng)是第一頁了");
}

function nextPage()
{
   if(this.page<this.pagecount)
      loadData(this.page+1);
   else
      alert("已經(jīng)到最后一頁了");
}
function turn(i)
{
     loadData(i);
}