OfflineSave離線保存代碼再次發(fā)布使用說明

更新時間：2007年05月23日 00:00:00 作者：

必知：所有需要處理的HTML元素必須具有ID屬性，組件只會探測元素的ID屬性

1. 在</Head>上加入
<STYLE>
   .userData {behavior:url(#default#userdata);}
</STYLE>

2. 在<body>下加入
<INPUT type=text class=userData id=OfflineSave_Area style="display:none">

3. 在</body>上加入
<script src=OfflineSave.js></script>

4. 為form標簽加入擴展屬性OfflineSave
例：<form id=myOfflineSaveForm OfflineSave ToolsBarStyle="mycssclass">
ToolsBarStyle為css class屬性，容器為div,包含select,input,button

注意：
情況1：
<form id=myform onsubmit="docheck(this)">
<input type=text id=mytext>
<input type=submit value=submit>
</form>
在這種情況下,組件可以自動探測服務器存活狀態(tài)，如服務器無法連接時，會提示本地保存,
并且docheck函數(shù)也可以正常工作

情況2：
<form id=myform >
<input type=text id=mytext>
<input type=button value=submit onclick="myform.submit()">
</form>
在這種情況下,組件無法截獲提交事件，也無法自動探測服務器存活狀態(tài)

建議：檢測表單內(nèi)數(shù)據(jù)時，在form標簽onsubmit事件內(nèi)寫入檢測函數(shù)

聯(lián)系我：qq:13872888  注明：blueidea

復制代碼代碼如下:

var os_Obj,os_usd; 

var os_dg=document.getElementById; 
var os_ButtonCss="style=\"cursor:hand;height:20px;padding:0px 3px;border:1px solid #67C1E4;\""; 
var os_SelectCss="style=\"font-size:12px;\""; 
var os_SaveSuccessStr="離線數(shù)據(jù)保存成功!"; 
var os_SaveProStr="請輸入離線保存的名稱:(如為空則用當前時間表示)"; 
var os_LoadProStr="確認要載入離線數(shù)據(jù)嗎?"; 
var os_DelProStr="確認要刪除離線數(shù)據(jù)嗎?"; 
var os_DelSuccessStr="離線數(shù)據(jù)刪除成功!"; 
var os_oUD="OfflineSave_oPersistInput"; 
var os_DefaultFiledLength=10;//Default Filed length 
var os_str="OfflineSave_"; 
var os_CannotSaveStr="保存數(shù)據(jù)時出現(xiàn)錯誤![離線保存空間僅限640K]\n\n有可能已超出離線保存容量!請刪除部分數(shù)據(jù)后再保存!"; 
var os_expires = (new Date(2010,1,1)).toUTCString(); 


InitOfflineSave(); 
function InitOfflineSave(){ 
    for(var i=0;i<document.forms.length;i++){ 
        if(document.forms[i].OfflineSave!=null){ 
            os_usd=os_dg("OfflineSave_Area"); 
            var tbs=document.forms[i].ToolsBarStyle==null?"":document.forms[i].ToolsBarStyle; 
            os_CreateToolBar(document.forms[i],tbs); 
            os_GetOfflineSaveList(document.forms[i].id); 
            var cmd=document.forms[i].onsubmit==null?"":document.forms[i].onsubmit; 
            if(cmd!=""){ 
                cmd=document.forms[i].onsubmit+""; 
                cmd=cmd.split("{")[1].split("}")[0].replace("\n",""); 
            } 
            cmd=escape(cmd); 
            eval("document.forms[i].onsubmit=function(){return os_CheckSubmit('"+document.forms[i].id+"','"+cmd+"');}"); 
            break; 
        } 
    } 
} 

function os_CreateToolBar(obj,boolbarstyle){ 
    var hc; 
    hc="<div id='os_"+obj.id+"_div'><select id='os_"+obj.id+"_Select' "+os_SelectCss+">"; 
    hc+="</select>"; 
    hc+="&nbsp;"; 
    hc+="<input type=button "+os_ButtonCss+" value=載入 onclick=\"os_LoadData('"+obj.id+"');\">"; 
    hc+="&nbsp;"; 
    hc+="<input type=button "+os_ButtonCss+" value=刪除 onclick=\"os_DelData('"+obj.id+"');\">"; 
    hc+="&nbsp;&nbsp;"; 
    hc+="<input type=button "+os_ButtonCss+" value=離線保存 onclick=\"os_SaveData('"+obj.id+"');\"></div>"; 
    obj.innerHTML=hc+obj.innerHTML; 
    if(boolbarstyle==""){ 
        os_dg("os_"+obj.id+"_div").style.textAlign     = "left"; 
        os_dg("os_"+obj.id+"_div").style.textvAlign     = "middle"; 
        os_dg("os_"+obj.id+"_div").style.paddingTop     = "3"; 
        os_dg("os_"+obj.id+"_div").style.height     = "30"; 
        os_dg("os_"+obj.id+"_div").style.border     = "1 solid black"; 
        os_dg("os_"+obj.id+"_div").style.paddingLeft     = "5"; 
    } 
    else 
        os_dg("os_"+obj.id+"_div").className=boolbarstyle; 
} 

function os_CheckSubmit(id,subfunc){ 
    if(!os_CanSubmit(os_dg(id).action)){ 
        if(confirm("離線保存提示:\n\n您要提交的服務器連接可能出現(xiàn)問題,是否進行離線保存?")){ 
            os_SaveData(id); 
        } 
        return false; 
    } 
    eval(unescape(subfunc));     
} 

function os_LoadData(id){ 
    var v=os_dg("os_"+id+"_Select").selectedIndex; 
    if(v==0)    return; 

    var ud=os_str+id+os_dg(id).length; 
    if(confirm(os_LoadProStr+"\n\n記錄名稱:"+os_getUserData(ud,"f_"+v+"_os_savename")+"\n保存時間:"+os_getUserData(ud,"f_"+v+"_os_savedate"))){ 
        var lcount=os_dg(id).length; 
        for(var i=0;i<lcount;i++){ 
            if(os_dg(id).item(i).type!="submit"&&os_dg(id).item(i).type!="reset"&&os_dg(id).item(i).type!="button"&&os_dg(id).item(i).id!="os_"+id+"_Select"){ 
                if(os_dg(id).item(i).type=="radio"||os_dg(id).item(i).type=="checkbox") 
                    os_dg(os_dg(id).item(i).id).checked=os_getUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id)=="1"?true:false; 
                else{ 
                    if(os_dg(id).item(i).type=="select-multiple"){ 
                        var sm=os_getUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id).split(","); 
                        var x; 
                        for(x=0;x<os_dg(id).item(i).length;x++) 
                            os_dg(id).item(i).options[x].selected=false; 
                        for(x=0;x<sm.length-1;x++) 
                            os_dg(id).item(i).options[parseInt(sm[x])].selected=true; 
                    } 
                    else{ 
                        if(os_dg(id).item(i).type=="select-one") 
                            os_dg(os_dg(id).item(i).id).selectedIndex=parseInt(os_getUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id)); 
                        else{ 
                            //alert(os_getUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id)); 
                            os_dg(os_dg(id).item(i).id).value=unescape(os_getUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id)); 
                        } 
                    } 
                } 
            } 
        } 
    } 
} 

function os_DelData(id){ 
    var v=os_dg("os_"+id+"_Select").selectedIndex; 
    if(v==0)    return; 

    var ud=os_str+id+os_dg(id).length; 
    if(confirm(os_DelProStr+"\n\n記錄名稱:"+os_getUserData(ud,"f_"+v+"_os_savename")+"\n保存時間:"+os_getUserData(ud,"f_"+v+"_os_savedate"))){ 
        var i=0; 
        var ud=os_str+id+os_dg(id).length; 
        var lcount=parseInt(os_getUserData(ud,"count")); 

        var vcount=os_dg(id).length; 
        for(i=0;i<vcount;i++){ 
            if(os_dg(id).item(i).type!="button"&&os_dg(id).item(i).id!="os_"+id+"_Select") 
                if(v<lcount) 
                    os_putUserData(ud,"f_"+v+"_"+os_dg(id).item(i).id,os_getUserData(ud,"f_"+lcount+"_"+os_dg(id).item(i).id)); 
                os_remUserData(ud,"f_"+lcount+"_"+os_dg(id).item(i).id); 
        } 
        if(v<lcount){ 
            os_putUserData(ud,"f_"+v+"_os_savename",os_getUserData(ud,"f_"+lcount+"_os_savename")); 
            os_putUserData(ud,"f_"+v+"_os_savedate",os_getUserData(ud,"f_"+lcount+"_os_savedate")); 
        } 
        os_remUserData(ud,"f_"+lcount+"_os_savename"); 
        os_remUserData(ud,"f_"+lcount+"_os_savedate"); 

        eval("os_putUserData(ud,\"count\",\""+(lcount-1)+"\");"); 

        var s=os_dg("os_"+id+"_Select"); 
        if(lcount==1){ 
            os_delUserData(ud); 
            while (s.length>0) s.remove(0); 
            s.add(new Option("無數(shù)據(jù)",0));             
        } 
        else{ 
            s.item(0).text="共有"+(lcount-1)+"個記錄"; 
            if(v<s.length){ 
                s.item(0).value=0; 
                s.item(v).text=s.item(s.length-1).text; 
            } 
            s.remove(s.length-1);             
        } 
        alert(os_DelSuccessStr); 
    } 
} 

function os_SaveData(id){ 
    if(os_dg(id).length<=0){ 
        alert("[OfflineSave]Error:\n\n"+id+" no Element!(input,radio,checkbox,select)"); 
        return; 
    } 

    var sd=new Date(); 
    var sn=prompt(os_SaveProStr,sd.toLocaleString()+":MyData"); 
    var ud=os_str+id+os_dg(id).length; 
    var lcount=os_getUserData(ud,"count"); 
    lcount=lcount==""||lcount==null?1:parseInt(lcount)+1; 
    if(os_dg(id).length*10*2*lcount>64000){ 
        alert(os_CannotSaveStr); 
        return; 
    } 
    try{ 

    sn=sn==""?sd.toLocaleString():sn; 

    var vcount=os_dg(id).length; 
    for(var i=0;i<vcount;i++){ 
        if(os_dg(id).item(i).type!="submit"&&os_dg(id).item(i).type!="reset"&&os_dg(id).item(i).type!="button"&&os_dg(id).item(i).id!="os_"+id+"_Select"){ 
            if(os_dg(id).item(i).type=="radio"||os_dg(id).item(i).type=="checkbox"){ 
                eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_"+os_dg(id).item(i).id+"\",\""+(os_dg(id).item(i).checked?"1":"0")+"\");"); 
            } 
            else{ 
                if(os_dg(id).item(i).type=="select-multiple"){ 
                    var mc=""; 
                    for(var x=0;x<os_dg(id).item(i).length;x++){ 
                        if(os_dg(id).item(i).options[x].selected)    mc+=x+","; 
                    }     
                    eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_"+os_dg(id).item(i).id+"\",\""+mc+"\");"); 
                } 
                else{ 
                    if(os_dg(id).item(i).type=="select-one") 
                        eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_"+os_dg(id).item(i).id+"\",\""+os_dg(id).item(i).selectedIndex+"\");"); 
                    else 
                        eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_"+os_dg(id).item(i).id+"\",\""+escape(os_dg(id).item(i).value)+"\");"); 
                } 
            } 
        } 
    } 
    eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_os_savename\",\""+sn+"\");"); 
    eval("os_putUserData(\""+ud+"\",\"f_"+lcount+"_os_savedate\",\""+sd.toLocaleString()+"\");"); 
    eval("os_putUserData(ud,\"count\",\""+lcount+"\");");//save list count 
    var s=os_dg("os_"+id+"_Select"); 
    s.item(0).text="共有"+lcount+"個記錄"; 
    s.item(0).value=0; 
    s.add(new Option(sn,lcount)); 
    alert(os_SaveSuccessStr); 
    } 
    catch(e){ 
        alert(os_CannotSaveStr+"\n\n錯誤原因:"+e); 
    } 
} 

function os_GetOfflineSaveList(id){ 
    var ud=os_str+id+os_dg(id).length; 
    var s=os_dg("os_"+id+"_Select"); 
    var lcount=os_getUserData(ud,"count"); 
    var sv=""; 
    while (s.length>0) s.remove(0); 
    lcount=lcount==""||lcount==null?0:parseInt(lcount); 
    if(lcount<=0) 
        s.add(new Option("無數(shù)據(jù)","0")); 
    else{ 
        s.add(new Option("共有"+lcount+"個記錄","0")); 
        for(var i=1;i<=lcount;i++){ 
            eval("sv=os_getUserData(ud,\"f_"+i+"_os_savename\");"); 
            s.add(new Option(sv,i));     
        } 
    } 
} 

function os_putUserData(sUDName,sName,sVal) { 
  os_usd.load(sUDName); 
  os_usd.expires = os_expires; 
  os_usd.setAttribute(sName,sVal); 
  os_usd.save(sUDName); 
  return; 
} 

function os_remUserData(sUDName,sName) { 
  os_usd.load(sUDName); 
  os_usd.removeAttribute(sName); 
  os_usd.save(sUDName); 
  return; 
} 

function os_getUserData(sUDName,sName) { 
  os_usd.load(sUDName); 
  return os_usd.getAttribute(sName); 
} 

function os_delUserData(sUDName){ 
  var oTimeNow = new Date(); // Start Time 
  oTimeNow.setMinutes(oTimeNow.getMinutes()+1); 
  var sExpirationDate = oTimeNow.toUTCString(); 
  os_usd.load(sUDName); 
  os_usd.expires = sExpirationDate; 
  os_usd.save(sUDName); 
  return; 
} 

function os_CanSubmit(url){ 
    var xmlHTTP = window.ActiveXObject? new ActiveXObject("Microsoft.XMLHTTP"):new XMLHttpRequest(); 
    xmlHTTP.open("get",url,false); 
    xmlHTTP.send(""); 
    return xmlHTTP.status=="200"; 
}

OfflineSave.htm

復制代碼代碼如下:

<html> 
    <head> 
        <title>離線保存</title> 
        <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
        <STYLE> .userData {behavior:url(#default#userdata);} 
    </STYLE> 
        <link href="css.css" rel="stylesheet" type="text/css"> 
    </head> 
    <body> 
        <INPUT type="text" class="userData" id="OfflineSave_Area" style="DISPLAY:none"> 
        <table width="100%" border="0" cellpadding="0" cellspacing="0" style="FONT-SIZE:12px"> 
            <tr> 
                <td height="78" colspan="3" valign="top"><font size="4" color="red">Ajax演示程序(J2EE)</font> 
                    <BR> 
                    <BR> 
                    服務端:<b>JDK1.4 TomCAT4.1 Hibernate3 MSSQL Server2000(SP4) DWR1.0</b><BR> 
                    客戶端:<b>JavaScript(CallBack) VML </b> 
                    <BR> 
                    編寫人:富深協(xié)通常州研發(fā)中心 姜泉</td> 
            </tr> 
            <tr> 
                <td colspan="3"><BR> 
                    <table border="1" class="listView" width="100%"> 
                        <Caption> 
                            離線數(shù)據(jù)保存(僅限ＩＥ瀏覽器5.0版本以上)</Caption> 
                        <tbody> 
                            <tr> 
                                <td><form id="myOfflineSaveForm" action="J2EE_AJAX.html" onsubmit="alert('這是在HTML頁面中的onsubmit事件中執(zhí)行的函數(shù)!');" OfflineSave> 
                                        <table cellSpacing="0" cellPadding="2" width="100%" border="1"> 
                                            <TR> 
                                                <TD>名稱<input type="text" id="name" size="5"> 
                                                </TD> 
                                                <TD>公司全稱<TEXTAREA id="gsqc" name="gsqc" rows="2" cols="20"> 
                                                    </TEXTAREA></TD> 
                                                <TD>客戶代碼<INPUT id="dm" type="checkbox" name="dm"></TD> 
                                            </TR> 
                                            <tr> 
                                                <TD>分類<SELECT id="fl" name="fl"> 
                                                        <OPTION selected>中國人</OPTION> 
                                                        <OPTION>外星人</OPTION> 
                                                        <OPTION>山西人</OPTION> 
                                                    </SELECT></TD> 
                                                <TD>性別<INPUT id="cz" type="radio" value="cz" checked name="RadioGroup">男<INPUT id="cz1" type="radio" value="cz1" name="RadioGroup">女</TD> 
                                                <TD>增加日期<SELECT id="rq" size="4" name="rq" multiple> 
                                                        <OPTION>2000年</OPTION> 
                                                        <OPTION>2003年</OPTION> 
                                                        <OPTION>2004年</OPTION> 
                                                        <OPTION>2005年</OPTION> 
                                                    </SELECT></TD> 
                                            </tr> 
                                        </table><input type=submit value=submit > 
                                    </form> 
                                </td> 
                            </tr> 
                        </tbody> 
                    </table> 
                </td> 
            </tr> 
        </table> 

        <script src="OfflineSave.js"></script> 
    </body> 
</html> 