<html>
<style>
body{margin:0;font-size:10pt;background:#666666;padding:100px}
#mousewindow{position:absolute;font-size:0;border:1px dashed #ff6600;display:none;background:#ffffcc;opacity: 0.50;filter:alpha(opacity=50)}
#nofocus{border:0;width:0;height:0;font-size:0;background:none;overflow:hidden;}
</style>
<body onload=myctrl()>
<div id=mousewindow><input id=nofocus></div>
<script>
//var x,y,ox,oy,osl,ost,sl,st,cw,ch,xy=false,chk,imgurl,ctrlable=false
function myctrl(){
var x,y,ox,oy,osl,ost,sl,st,cw,ch,xy=false,chk
document.onmousedown=function(evt) {
evt=evt||window.event
//alert(evt.srcElement.tagName)
ox=evt.clientX;oy=evt.clientY
osl=document.body.scrollLeft;ost=document.body.scrollTop
cw=document.body.clientWidth;ch=document.body.clientHeight
//if(evt.srcElement.tagName=="BODY"&&ox<=cw&&oy<=ch)
if(ox<=cw&&oy<=ch)
{
xy=true;
mousewindow.style.left=ox+osl+"px";mousewindow.style.top=oy+ost+"px"
chk=document.all.tags("input")
for(i=0;i<chk.length;i++){
if(chk[i].type=="checkbox"){chk[i].chkctrl=0}
}
}
}
document.onmousemove=function(evt) {
evt=evt||window.event
if(xy==true) {
//nofocus.focus()
x=evt.clientX;y=evt.clientY
sl=document.body.scrollLeft;st=document.body.scrollTop
mousewindow.style.display="block"
nofocus.focus()
mousewindow.style.width=Math.abs(x-ox+sl-osl)+"px"
mousewindow.style.height=Math.abs(y-oy+st-ost)+"px"
if(x>ox){mousewindow.style.left=ox+osl+"px"}
if(x<ox){mousewindow.style.left=x+sl+"px"}
if(y>oy){mousewindow.style.top=oy+ost+"px"}
if(y<oy){mousewindow.style.top=y+st+"px"}
minx=parseInt(mousewindow.style.left+"px")
maxx=minx+parseInt(mousewindow.style.width)
miny=parseInt(mousewindow.style.top)
maxy=miny+parseInt(mousewindow.style.height)
ctrl(minx,maxx,miny,maxy)
}
}
document.onmouseup=function() {
xy=false
mousewindow.style.display="none"
mousewindow.style.width=0
mousewindow.style.height=0
}
}
function ctrl(minx,maxx,miny,maxy){
chk=document.all.tags("input")
for(i=0;i<chk.length;i++){
var obj=chk[i]
var mmx=obj.offsetLeft,mmy=obj.offsetTop
while(obj=obj.offsetParent)
{mmx+=obj.offsetLeft;mmy+=obj.offsetTop;}
if(mmx>=minx&&mmx<=maxx&&mmy>=miny&&mmy<=maxy)
{
if(chk[i].chkctrl=="0"&&chk[i].checked==false){chk[i].checked=true;chk[i].chkctrl=1}
if(chk[i].chkctrl=="0"&&chk[i].checked==true){chk[i].checked=false;chk[i].chkctrl=-1}
}
else {
if(chk[i].checked==true&&chk[i].chkctrl!=0){chk[i].checked=false;chk[i].chkctrl=0}
if(chk[i].checked==false&&chk[i].chkctrl!=0){chk[i].checked=true;chk[i].chkctrl=0}
}
}
}
</script>
<div align=center style="width:100%;height:100%">
<input type=checkbox><input type=checkbox><input type=checkbox><input type=checkbox><input
type=checkbox><Br>
<input type=checkbox><input type=checkbox><input type=checkbox><input type=checkbox><input
type=checkbox><Br>
<input type=checkbox><input type=checkbox><input type=checkbox><input type=checkbox><input
type=checkbox><Br>
<input type=checkbox><input type=checkbox><input type=checkbox><input type=checkbox><input
type=checkbox><Br>
<input type=checkbox><input type=checkbox><input type=checkbox><input type=checkbox><input
type=checkbox><Br>
</div>
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