var text=""; day = new Date( ); 
time = day.getHours( ); 　　
if (( time >= 0) && (time < 6)) 　　
text="imges/3.gif" 　　
if (( time >= 6) && (time < 16))         
text="imges/1.gif" 　　
if (( time >= 16) && (time < 19)) 　　　　
text="imges/2.gif" 　　
if (( time >= 19) && (time < 24)) 　　
text="imges/3.gif" 
document.body.style.backgroundImage="url("+text+")"; 



function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_dragLayer(objName,x,hL,hT,hW,hH,toFront,dropBack,cU,cD,cL,cR,targL,targT,tol,dropJS,et,dragJS) { //v4.01
  //Copyright 1998 Macromedia, Inc. All rights reserved.
  var i,j,aLayer,retVal,curDrag=null,curLeft,curTop,IE=document.all,NS4=document.layers;
  var NS6=(!IE&&document.getElementById), NS=(NS4||NS6); if (!IE && !NS) return false;
  retVal = true; if(IE && event) event.returnValue = true;
  if (MM_dragLayer.arguments.length > 1) {
    curDrag = MM_findObj(objName); if (!curDrag) return false;
    if (!document.allLayers) { document.allLayers = new Array();
      with (document) if (NS4) { for (i=0; i<layers.length; i++) allLayers[i]=layers[i];
        for (i=0; i<allLayers.length; i++) if (allLayers[i].document && allLayers[i].document.layers)
          with (allLayers[i].document) for (j=0; j<layers.length; j++) allLayers[allLayers.length]=layers[j];
      } else {
        if (NS6) { var spns = getElementsByTagName("span"); var all = getElementsByTagName("div"); 
          for (i=0;i<spns.length;i++) if (spns[i].style&&spns[i].style.position) allLayers[allLayers.length]=spns[i];}
        for (i=0;i<all.length;i++) if (all[i].style&&all[i].style.position) allLayers[allLayers.length]=all[i]; 
    } }
    curDrag.MM_dragOk=true; curDrag.MM_targL=targL; curDrag.MM_targT=targT;
    curDrag.MM_tol=Math.pow(tol,2); curDrag.MM_hLeft=hL; curDrag.MM_hTop=hT;
    curDrag.MM_hWidth=hW; curDrag.MM_hHeight=hH; curDrag.MM_toFront=toFront;
    curDrag.MM_dropBack=dropBack; curDrag.MM_dropJS=dropJS;
    curDrag.MM_everyTime=et; curDrag.MM_dragJS=dragJS;
    curDrag.MM_oldZ = (NS4)?curDrag.zIndex:curDrag.style.zIndex;
    curLeft= (NS4)?curDrag.left:(NS6)?parseInt(curDrag.style.left):curDrag.style.pixelLeft; 
    if (String(curLeft)=="NaN") curLeft=0; curDrag.MM_startL = curLeft;
    curTop = (NS4)?curDrag.top:(NS6)?parseInt(curDrag.style.top):curDrag.style.pixelTop; 
    if (String(curTop)=="NaN") curTop=0; curDrag.MM_startT = curTop;
    curDrag.MM_bL=(cL<0)?null:curLeft-cL; curDrag.MM_bT=(cU<0)?null:curTop-cU;
    curDrag.MM_bR=(cR<0)?null:curLeft+cR; curDrag.MM_bB=(cD<0)?null:curTop+cD;
    curDrag.MM_LEFTRIGHT=0; curDrag.MM_UPDOWN=0; curDrag.MM_SNAPPED=false; //use in your JS!
    document.onmousedown = MM_dragLayer; document.onmouseup = MM_dragLayer;
    if (NS) document.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
  } else {
    var theEvent = ((NS)?objName.type:event.type);
    if (theEvent == 'mousedown') {
      var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
      var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
      var maxDragZ=null; document.MM_maxZ = 0;
      for (i=0; i<document.allLayers.length; i++) { aLayer = document.allLayers[i];
        var aLayerZ = (NS4)?aLayer.zIndex:parseInt(aLayer.style.zIndex);
        if (aLayerZ > document.MM_maxZ) document.MM_maxZ = aLayerZ;
        var isVisible = (((NS4)?aLayer.visibility:aLayer.style.visibility).indexOf('hid') == -1);
        if (aLayer.MM_dragOk != null && isVisible) with (aLayer) {
          var parentL=0; var parentT=0;
          if (NS6) { parentLayer = aLayer.parentNode;
            while (parentLayer != null && parentLayer.style.position) {             
              parentL += parseInt(parentLayer.offsetLeft); parentT += parseInt(parentLayer.offsetTop);
              parentLayer = parentLayer.parentNode;
          } } else if (IE) { parentLayer = aLayer.parentElement;       
            while (parentLayer != null && parentLayer.style.position) {
              parentL += parentLayer.offsetLeft; parentT += parentLayer.offsetTop;
              parentLayer = parentLayer.parentElement; } }
          var tmpX=mouseX-(((NS4)?pageX:((NS6)?parseInt(style.left):style.pixelLeft)+parentL)+MM_hLeft);
          var tmpY=mouseY-(((NS4)?pageY:((NS6)?parseInt(style.top):style.pixelTop) +parentT)+MM_hTop);
          if (String(tmpX)=="NaN") tmpX=0; if (String(tmpY)=="NaN") tmpY=0;
          var tmpW = MM_hWidth;  if (tmpW <= 0) tmpW += ((NS4)?clip.width :offsetWidth);
          var tmpH = MM_hHeight; if (tmpH <= 0) tmpH += ((NS4)?clip.height:offsetHeight);
          if ((0 <= tmpX && tmpX < tmpW && 0 <= tmpY && tmpY < tmpH) && (maxDragZ == null
              || maxDragZ <= aLayerZ)) { curDrag = aLayer; maxDragZ = aLayerZ; } } }
      if (curDrag) {
        document.onmousemove = MM_dragLayer; if (NS4) document.captureEvents(Event.MOUSEMOVE);
        curLeft = (NS4)?curDrag.left:(NS6)?parseInt(curDrag.style.left):curDrag.style.pixelLeft;
        curTop = (NS4)?curDrag.top:(NS6)?parseInt(curDrag.style.top):curDrag.style.pixelTop;
        if (String(curLeft)=="NaN") curLeft=0; if (String(curTop)=="NaN") curTop=0;
        MM_oldX = mouseX - curLeft; MM_oldY = mouseY - curTop;
        document.MM_curDrag = curDrag;  curDrag.MM_SNAPPED=false;
        if(curDrag.MM_toFront) {
          eval('curDrag.'+((NS4)?'':'style.')+'zIndex=document.MM_maxZ+1');
          if (!curDrag.MM_dropBack) document.MM_maxZ++; }
        retVal = false; if(!NS4&&!NS6) event.returnValue = false;
    } } else if (theEvent == 'mousemove') {
      if (document.MM_curDrag) with (document.MM_curDrag) {
        var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
        var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
        newLeft = mouseX-MM_oldX; newTop  = mouseY-MM_oldY;
        if (MM_bL!=null) newLeft = Math.max(newLeft,MM_bL);
        if (MM_bR!=null) newLeft = Math.min(newLeft,MM_bR);
        if (MM_bT!=null) newTop  = Math.max(newTop ,MM_bT);
        if (MM_bB!=null) newTop  = Math.min(newTop ,MM_bB);
        MM_LEFTRIGHT = newLeft-MM_startL; MM_UPDOWN = newTop-MM_startT;
        if (NS4) {left = newLeft; top = newTop;}
        else if (NS6){style.left = newLeft; style.top = newTop;}
        else {style.pixelLeft = newLeft; style.pixelTop = newTop;}
        if (MM_dragJS) eval(MM_dragJS);
        retVal = false; if(!NS) event.returnValue = false;
    } } else if (theEvent == 'mouseup') {
      document.onmousemove = null;
      if (NS) document.releaseEvents(Event.MOUSEMOVE);
      if (NS) document.captureEvents(Event.MOUSEDOWN); //for mac NS
      if (document.MM_curDrag) with (document.MM_curDrag) {
        if (typeof MM_targL =='number' && typeof MM_targT == 'number' &&
            (Math.pow(MM_targL-((NS4)?left:(NS6)?parseInt(style.left):style.pixelLeft),2)+
             Math.pow(MM_targT-((NS4)?top:(NS6)?parseInt(style.top):style.pixelTop),2))<=MM_tol) {
          if (NS4) {left = MM_targL; top = MM_targT;}
          else if (NS6) {style.left = MM_targL; style.top = MM_targT;}
          else {style.pixelLeft = MM_targL; style.pixelTop = MM_targT;}
          MM_SNAPPED = true; MM_LEFTRIGHT = MM_startL-MM_targL; MM_UPDOWN = MM_startT-MM_targT; }
        if (MM_everyTime || MM_SNAPPED) eval(MM_dropJS);
        if(MM_dropBack) {if (NS4) zIndex = MM_oldZ; else style.zIndex = MM_oldZ;}
        retVal = false; if(!NS) event.returnValue = false; }
      document.MM_curDrag = null;
    }
    if (NS) document.routeEvent(objName);
  } return retVal;
}
function loadwin(obj){
	with(MM_findObj(obj))with(style){
		filters[0].apply();
		display='';
		filters[0].play();
	}
}
function cs(captionBG,bodyBG,tableBG){
oldBody=document.body;
	with(oldBody){
		var newBody=cloneNode();
		style.filter='blendtrans(duration=1)';
		filters[0].apply();
		with(document.styleSheets[0]){
			with(rules[0].style){backgroundColor=captionBG;}
			with(rules[1].style){backgroundColor=bodyBG;}
			with(rules[2].style){backgroundColor=tableBG}
		}
		filters[0].play();
		setTimeout(function(){
				if(oldBody!=null){
					oldBody.applyElement(newBody, "inside")
					oldBody.swapNode(newBody);
					oldBody.removeNode(true);
					}
				},1500);
	}
}



/*
var delta=0.15
var collection;
function floaters() {
this.items = [];
this.addItem = function(id,x,y,content)
{
document.write('<DIV id='+id+' style="Z-INDEX: 10; POSITION: absolute; width:80px; height:60px;left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'">'+content+'</DIV>');

var newItem = {};
newItem.object = document.getElementById(id);
newItem.x = x;
newItem.y = y;

this.items[this.items.length] = newItem;
}
this.play = function()
{
collection = this.items
setInterval('play()',10);
}
}
function play()
{

for(var i=0;i<collection.length;i++)
{
var followObj = collection[i].object;
var followObj_x = (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
var followObj_y = (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);

if(followObj.offsetLeft!=(document.body.scrollLeft+followObj_x)) {
var dx=(document.body.scrollLeft+followObj_x-followObj.offsetLeft)*delta;
dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
followObj.style.left=followObj.offsetLeft+dx;
}

if(followObj.offsetTop!=(document.body.scrollTop+followObj_y)) {
var dy=(document.body.scrollTop+followObj_y-followObj.offsetTop)*delta;
dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
followObj.style.top=followObj.offsetTop+dy;
}
followObj.style.display = '';
}
} 

var theFloaters = new floaters();
theFloaters.addItem('followDiv1','document.body.clientWidth-200',250,'<iframe  src="new.asp" width="200" height="400" scrolling="no"></iframe><br><br>');
theFloaters.addItem('followDiv2',10,250,'<iframe  src="new.asp" width="200" height="400" scrolling="no"></iframe><br><br>');
theFloaters.play();
*/

function logincheck()
{
if (document.form1.user_name.value=="")
{
alert("× 你的用戶名不能為空！");
return false;
}
else if(document.form1.user_pw.value==""){
alert("× 你的密碼不能為空！");
return false;
}
return true;
}
function checkkey()
{
if (document.form2.keywords.value=="")
{
alert("× 搜索的關鍵字不能為空！");
document.form2.keywords.focus();
return false;
}
return true;
}

function check() {

if(document.myform.user_name.value.length < 2 || document.myform.user_name.value.length  > 20)
        { 
		alert("請您輸入用戶名2至20位！");
        document.myform.user_name.focus();
		document.myform.user_name.select();
		return false;
       }
     if(document.myform.user_pw.value.length < 6|| document.myform.user_pw.value.length > 12)
        {
		alert("請您輸入密碼4至12位！"); 
         document.myform.user_pw.focus();
		 return false;
         }
       if(document.myform.user_repw.value=="")
        {
		alert("請確認您輸入的密碼！");
          document.myform.user_repw.focus();
		  return false;
        }
        if(document.myform.user_pw.value!=document.myform.user_repw.value)
        {
		alert("兩次輸入密碼不一樣!");
        document.myform.user_repw.focus();
		return false;
        }
		if(document.myform.email.value=="")
        {
		alert("郵箱位址不能為空!")
		document.myform.email.focus(); 
		  return false;
        }
        if(document.myform.email.value.length<6 || document.myform.email.value.length>36 || !validateEmail() )
		 {
		      alert("請您輸入正確的郵箱地址!");
		      document.myform.email.focus();
			  document.myform.email.select();
			  return false;
	       }
		if(document.myform.surname.value=="")
        {
		alert("請輸入真實姓名!");
        document.myform.surname.focus();
		document.myform.surname.select();
		return false;
        }
		if(document.myform.professional.value=="")
        {
		alert("職業不能為空!")
		document.myform.professional.focus(); 
		  return false;
        }
		if(document.myform.school.value=="")
        {
		alert("學校名稱不能為空!")
		document.myform.school.focus(); 
		  return false;
        }
		if(document.myform.address.value=="")
        {
		alert("聯係地址不能為空!")
		document.myform.address.focus(); 
		  return false;
        }
		if(document.myform.phone.value=="")
        {
		alert("聯係電話不能為空!")
		document.myform.phone.focus(); 
		  return false;
        }
		if(document.myform.pic.value=="")
        {
		alert("頭像圖片不能為空!")
		document.myform.pic.focus(); 
		  return false;
        }

}

function validateEmail(){
	var re=/^[\w-]+(\.*[\w-]+)*@([0-9a-z]+[0-9a-z-]*[0-9a-z]+\.)+[a-z]{2,3}$/i;
	if(re.test(myform.email.value))
		return true;
	else
		return false;
}