一款不错的键盘密码输入js程序

varCapsLockValue=0;

varcheck;
functionsetVariables(){
tablewidth=630;//logowidth,inpixels
tableheight=20;//logoheight,inpixels
if(navigator.appName=="Netscape"){
horz=".left";
vert=".top";
docStyle="document.";
styleDoc="";
innerW="window.innerWidth";
innerH="window.innerHeight";
offsetX="window.pageXOffset";
offsetY="window.pageYOffset";
}
else{
horz=".pixelLeft";
vert=".pixelTop";
docStyle="";
styleDoc=".style";
innerW="document.body.clientWidth";
innerH="document.body.clientHeight";
offsetX="document.body.scrollLeft";
offsetY="document.body.scrollTop";
}
}
functioncheckLocation(){
if(check){
objectXY="softkeyboard";
varavailableX=eval(innerW);
varavailableY=eval(innerH);
varcurrentX=eval(offsetX);
varcurrentY=eval(offsetY);
x=availableX-tablewidth+currentX;
//y=availableY-tableheight+currentY;
y=currentY;

evalMove();
}
setTimeout("checkLocation()",0);
}
functionevalMove(){
//eval(docStyle+objectXY+styleDoc+horz+"="+x);
eval(docStyle+objectXY+styleDoc+vert+"="+y);
}
self.onError=null;
currentX=currentY=0;
whichIt=null;
lastScrollX=0;lastScrollY=0;
NS=(document.layers)?1:0;
IE=(document.all)?1:0;
functionheartBeat(){
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);
elsepercent=Math.floor(percent);
if(IE)document.all.softkeyboard.style.pixelTop+=percent;
if(NS)document.softkeyboard.top+=percent;
lastScrollY=lastScrollY+percent;}
if(diffX!=lastScrollX){
percent=.1*(diffX-lastScrollX);
if(percent>0)percent=Math.ceil(percent);
elsepercent=Math.floor(percent);
if(IE)document.all.softkeyboard.style.pixelLeft+=percent;
if(NS)document.softkeyboard.left+=percent;
lastScrollX=lastScrollX+percent;}}
functioncheckFocus(x,y){
stalkerx=document.softkeyboard.pageX;
stalkery=document.softkeyboard.pageY;
stalkerwidth=document.softkeyboard.clip.width;
stalkerheight=document.softkeyboard.clip.height;
if((x>stalkerx&&x<(stalkerx+stalkerwidth))&&(y>stalkery&&y<(stalkery+stalkerheight)))returntrue;
elsereturnfalse;}
functiongrabIt(e){
check=false;
if(IE){
whichIt=event.srcElement;
while(whichIt.id.indexOf("softkeyboard")==-1){
whichIt=whichIt.parentElement;
if(whichIt==null){returntrue;}}
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.softkeyboard;
StalkerTouchedX=e.pageX-document.softkeyboard.pageX;
StalkerTouchedY=e.pageY-document.softkeyboard.pageY;}}
returntrue;}
functionmoveIt(e){
if(whichIt==null){returnfalse;}
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.pixelTopif(whichIt.style.pixelLeftif(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;
returnfalse;}
returnfalse;}
functiondropIt(){whichIt=null;
if(NS)window.releaseEvents(Event.MOUSEMOVE);
returntrue;}
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);

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