function showCalendar(sImg,bOpenBound,sFld1,sFld2,sCallback,flag)
{
    var fld1,fld2;
    var cf=document.getElementById("CalFrame");
    var wcf=window.frames.CalFrame;
    var oImg=document.getElementById(sImg);
    if(!oImg){alert("????????");return;}
    if(!sFld1){alert("????????");return;}
    fld1=document.getElementById(sFld1);
    if(!fld1){alert("????????");return;}
    if(fld1.tagName!="INPUT"||fld1.type!="text"){alert("?????????");return;}
    if(sFld2)
    {
        fld2=document.getElementById(sFld2);
        if(!fld2){alert("????????");return;}
        if(fld2.tagName!="INPUT"||fld2.type!="text"){alert("?????????");return;}
    }
    if(!wcf.bCalLoaded){alert("??????????????");return;}
    if(cf.style.display=="block"){cf.style.display="none";return;}
    
    var eT=0,eL=0,p=oImg;
    var sT=document.body.scrollTop,sL=document.body.scrollLeft;
    var eH=oImg.height,eW=oImg.width;
    while(p&&p.tagName!="BODY"){eT+=p.offsetTop;eL+=p.offsetLeft;p=p.offsetParent;}
    cf.style.top=(document.body.clientHeight-(eT-sT)-eH>=cf.height)?eT+eH:eT-cf.height;
    cf.style.left=(document.body.clientWidth-(eL-sL)>=cf.width)?eL:eL+eW-cf.width;
    cf.style.display="block";
    
    wcf.openbound=bOpenBound;
    wcf.fld1=fld1;
    wcf.fld2=fld2;
    wcf.callback=sCallback;
    wcf.initCalendar(flag);
}
function hideCalendar()
{
    var cf=document.getElementById("CalFrame");
    cf.style.display="none";
}
function setCheckInDate(d)
{
	document.getElementById("start_date").value=d;
	if(document.getElementById("level_date").value.length==0)
	{
		showCalendar('date_pic_2',false,'level_date','start_date');
	}
}