self.onError=null;

currentX = currentY = 0;

whichIt = null;

lastScrollX = 0; lastScrollY = 0;

NS = (document.layers) ? 1 : 0;

IE = (document.all) ? 1: 0;

<!-- STALKER CODE -->

function heartBeat() {

if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }

if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }

if(diffY != lastScrollY) {	                percent = .1 * (diffY - lastScrollY);

if(percent > 0) percent = Math.ceil(percent);

else percent = Math.floor(percent);					if(IE) document.all.floater.style.pixelTop += percent;

if(NS) document.floater.top += percent; 	                lastScrollY = lastScrollY + percent;

}

if(diffX != lastScrollX) {

percent = .1 * (diffX - lastScrollX);

if(percent > 0) percent = Math.ceil(percent);

else percent = Math.floor(percent);

if(IE) document.all.floater.style.pixelLeft += percent;

if(NS) document.floater.left += percent;

lastScrollX = lastScrollX + percent;

}

}	<!-- /STALKER CODE -->

<!-- DRAG DROP CODE -->

function checkFocus(x,y) {

stalkerx = document.floater.pageX;

stalkery = document.floater.pageY;

stalkerwidth = document.floater.clip.width;

stalkerheight = document.floater.clip.height;

if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;

else return false;

}	function grabIt(e) {

if(IE) {

whichIt = event.srcElement;

while (whichIt.id.indexOf("floater") == -1) {

whichIt = whichIt.parentElement;

if (whichIt == null) { return true; }

}

whichIt.style.pixelLeft = whichIt.offsetLeft;

whichIt.style.pixelTop = whichIt.offsetTop;

currentX = (event.clientX + document.body.scrollLeft);

currentY = (event.clientY + document.body.scrollTop);

} else {

window.captureEvents(Event.MOUSEMOVE);

if(checkFocus (e.pageX,e.pageY)) {

whichIt = document.floater;

StalkerTouchedX = e.pageX-document.floater.pageX;

StalkerTouchedY = e.pageY-document.floater.pageY;

} 		}

return true;

}

function moveIt(e) {

if (whichIt == null) { return false; }

if(IE) {

newX = (event.clientX + document.body.scrollLeft);

newY = (event.clientY + document.body.scrollTop);

distanceX = (newX - currentX);    distanceY = (newY - currentY);		    currentX = newX;    currentY = newY;

whichIt.style.pixelLeft += distanceX;		    whichIt.style.pixelTop += distanceY;

if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;			if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;

if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;

if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;

event.returnValue = false;

} else {

whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);

if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;

if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;

if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;

if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;

return false;

}

return false;

}

function dropIt() {

whichIt = null;

if(NS) window.releaseEvents (Event.MOUSEMOVE);

return true;

}

<!-- DRAG DROP CODE -->

if(NS) {

window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);

window.onmousedown = grabIt;

window.onmousemove = moveIt;

window.onmouseup = dropIt;

}

if(IE) {

//document.onmousedown = grabIt;

//document.onmousemove = moveIt;

//document.onmouseup = dropIt;

}

if(NS || IE) action = window.setInterval("heartBeat()",1);




function LRdelSpace(s)
{
	for(var i=s.length;i>0;i--)
		if(s.charAt(i-1).indexOf(" ")==-1) 
			break
	s=s.substr(0,i)
	for(i=0;i<s.length;i++)
		if(s.charAt(i).indexOf(" ")==-1) 
			break
	s=s.substr(i,s.length)
	return s
}

function GetNum(a)
{
   var i,t,j

   a=LRdelSpace(a)
   if (a.length=0) return ""
   for(i=0;i<a.length;i++)
   {
       t=0
       for(j=0;j<10;j++)
           if(a.charAt(i)==""+j) 
			t=1
       if(t==0)
		   return "c"
   }
   return a
}

function check()
{
  if(document.form.nick.value=="")
  {alert("你成天泡在网上会没有昵称？");
   document.form.nick.focus();
   return false;}
  if(GetNum(document.form.oicq.value) == "c")
		{
			alert("喂喂喂，你既然填了QQ号，就留一个正确的呀！")
			document.form.oicq.focus();
			return false;
		}
  if(document.form.content.value=="")
  {alert("你该不会留一个空白的留言吧？");
   document.form.content.focus();
   return false;}
  if(document.form.email.value=="")
	{alert("请填写电子邮件！");
     document.form.email.focus();
	 return false;
	 }
	var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_@.";
	var checkStr = document.form.email.value;
	var allValid = true;
	for (i = 0;  i < checkStr.length;  i++)
	{
		ch = checkStr.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
		if (ch == checkOK.charAt(j))
		if (j == checkOK.length)
		{
			allValid = false;
		}
	}

	if (document.form.email.value.length < 6)
	{
			allValid = false;
	}

	if (!allValid)
	{
		alert("您输入的电子邮件地址无效！");
		document.form.email.focus();
		return false;
	}

	address=document.form.email.value;
    if(address.length>0)
	{
        i=address.indexOf("@");
        if(i==-1)
		{
			window.alert("对不起！您输入的电子邮件地址是错误的！")
			document.form.email.focus();
			return false;
        }
       ii=address.indexOf(".")
        if(ii==-1)
		{
			window.alert("对不起！您输入的电子邮件地址是错误的！")
			document.form.email.focus();
			return false;
        }
    }
	if (checktext(document.form.email.value))
	{
		alert("请您输入有效的Email！");
		document.form.email.focus();
		return false;
	}
}