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function getNavWidthandHeightInfo()
{
    var s = "";
    s += " ÍøÒ³¿É¼ûÇøÓò¿í£º"+ document.body.clientWidth;
    s += " ÍøÒ³¿É¼ûÇøÓò¸ß£º"+ document.body.clientHeight;
    s += " ÍøÒ³¿É¼ûÇøÓò¿í£º"+ document.body.offsetWidth + " (°üÀ¨±ßÏߺ͹ö¶¯ÌõµÄ¿í)";
    s += " ÍøÒ³¿É¼ûÇøÓò¸ß£º"+ document.body.offsetHeight + " (°üÀ¨±ßÏߵĿí)";
    s += " ÍøÒ³ÕýÎÄÈ«ÎÄ¿í£º"+ document.body.scrollWidth;
    s += " ÍøÒ³ÕýÎÄÈ«Îĸߣº"+ document.body.scrollHeight;
    s += " ÍøÒ³±»¾íÈ¥µÄ¸ß(ff)£º"+ document.body.scrollTop;
    s += " ÍøÒ³±»¾íÈ¥µÄ¸ß(ie)£º"+ document.documentElement.scrollTop;
    s += " ÍøÒ³±»¾íÈ¥µÄ×ó£º"+ document.body.scrollLeft;
    s += " ÍøÒ³ÕýÎIJ¿·ÖÉÏ£º"+ window.screenTop;
    s += " ÍøÒ³ÕýÎIJ¿·Ö×ó£º"+ window.screenLeft;
    s += " ÆÁÄ»·Ö±æÂʵĸߣº"+ window.screen.height;
    s += " ÆÁÄ»·Ö±æÂÊµÄ¿í£º"+ window.screen.width;
    s += " ÆÁÄ»¿ÉÓù¤×÷Çø¸ß¶È£º"+ window.screen.availHeight;
    s += " ÆÁÄ»¿ÉÓù¤×÷Çø¿í¶È£º"+ window.screen.availWidth;
    s += " ÄãµÄÆÁÄ»ÉèÖÃÊÇ: "+ window.screen.colorDepth +" Î»²ÊÉ«";
    s += " ÄãµÄÆÁÄ»ÉèÖÃ: "+ window.screen.deviceXDPI +" ÏñËØ/Ó¢´ç";
    s += "µ±Ç°´°¿ÚµÄÄÚ²¿¿í¶È:"+ window.innerWidth;
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Àí½â JavaScript ±Õ°ü{×ªÔØ}

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String Àà Attribute and method
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javascript Ö® Closure

http://javascript.crockford.com/private.html
function a() {
var i = 0;
function b() {
alert(++i);
}
return b;
}
var c = a();
c();
 
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