var loadbar = new Ys_LoadBar(100000,"请稍后，系统正在向服务器提交您的请求……","请求通过!邮件发送中……");

    function Ys_LoadBar(totalTime,strTip,strWait){
        //private properties
        var loadTotalTime = 0;     //进度条的时间
        var loadMaxChar = 0;       //进度条的字符数目
        var loadPerTimeChar = 0;   //setTimeOut's interval          
        var loadstrTip = 0;        //上面的提示字符
        var loadstrWait = 0;       //进度条结束后下面跳动的字符
        
        this.loadTotalTime = totalTime;                
        this.loadstrTip = strTip;
        this.loadstrWait = strWait;
        
        //private funcitons
        this.loadInit = loadInit;
        this.loadExecute = loadExecute;
        this.loadWork = loadWork;
        this.loadStop = loadStop;
        this.loadWaitChange = loadWaitChange;
        this.loadDisplayDiv = loadDisplayDiv;
        this.loadDisabledAllForm = loadDisabledAllForm;

        //进行一些必要的初始化
        this.loadInit();    
    }

    /** *//**
     *  开始运行
     */
    function loadExecute(){
		
        loadFrame.style.visibility = "visible";
        this.loadWork();   
		
    }

    /** *//**
     *  初始化
     */
    function loadInit(){
        this.loadDisplayDiv(); 
        this.loadMaxChar = 100;                                    
        this.loadPerTimeChar = this.loadTotalTime/this.loadMaxChar;  
        this.loadDisabledAllForm();
    }

    /** *//**
     *  进度条显示
     */
    function loadWork(){
        loadBar.value += "■";
        loadNum.value = (parseInt(loadNum.value.replace("%",""))+1)+"%";
        if(parseInt(loadNum.value)>99){
            loadStop();
            return ;
        }
        setTimeout("this.loadWork()",this.loadPerTimeChar);
    }

    /** *//**
     *  进度条停止
     */
    function loadStop(){
        loadNum.style.display = "none";
        loadWaitChange();
    }

    /** *//**
     *  字幕跳动
     */
    function loadWaitChange(){
        if(loadWait.style.visibility=="visible")
            loadWait.style.visibility = "hidden";
        else
            loadWait.style.visibility = "visible";
        setTimeout("this.loadWaitChange()",500);
    }

    /** *//**
     *  显示div图层
     */
    function loadDisplayDiv(){
        document.write("<div id='loadFrame' style='position:absolute; left:0;bottom:200;left:-70; float:left;z-index:10; visibility:hidden;'>");
        document.write("    <table width=100% border=0 cellspacing=0 cellpadding=0>");
        document.write("    <tr>");
        document.write("    <td align='center'>");
        document.write("        <table border=2 cellspacing=0 cellpadding=0 bordercolor='#ff9900' width='300' height=151>");
        document.write("        <tr>");
        document.write("        <td>");
        document.write("            <table border=0 width='100%' bgcolor=#eeeeee  height=150>");
        document.write("                <tr>");
        document.write("                    <td height='3'></td>");
        document.write("                </tr>");
        document.write("                <tr>");
        document.write("                    <td align='center'><font style='font-size: 12px; margin-top:0px;color:green'>"+this.loadstrTip+"</font></td>");
        document.write("                </tr>");
        document.write("                <tr>");
        document.write("                    <td height='3'></td>");
        document.write("                </tr>");
        document.write("                <tr>");
        document.write("                    <td align='left'><input type='text' name='loadBar' size='200' style='border:none;background-color:#eeeeee;font-size:4px'>");
        document.write("                </tr>");
        document.write("                <tr>");
        document.write("                    <td align='center'>");
        document.write("                         <input type='text' name='loadNum' size=3 value='0%' style='border:none;background-color:#eeeeee'> ");
        document.write("                         <div id='loadWait' style='visibility:hidden'> <font style='font-size: 12px; margin-top:0px;color:#FF0000'> "+this.loadstrWait+" </font></div> ");
        document.write("                    </td>");
        document.write("                </tr>");
        document.write("                <tr>");
        document.write("                    <td height='3'></td>");
        document.write("                </tr>");
        document.write("            </table>");
        document.write("        </td>");
        document.write("        </tr>");
        document.write("        </table>");
        document.write("    </td>");
        document.write("    </tr>");
        document.write("    </table>");
        document.write("</div>");
    }

    /** *//**
     *  禁止所有表单
     */
    function loadDisabledAllForm(){
        for(i=0;i<document.forms.length;i++){        
            for(j=0;j<document.forms[i].length;j++){
                document.forms[i].elements[j].disabled = true;
            }
        }
    }