Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

javascript»ñÈ¡iframeÎĵµÄÚÈÝ(¼æÈÝIEºÍFirefox)

ÔÚÍøÉÏÕÒµ½ÔÚIEϲÙ×÷IFrameÄÚÈݵĴúÂë:
   
document.frames["MyIFrame"].document.getElementById("s").style.color="blue";
µ«ÊÇÕâÔÚFirefoxÏÂÎÞЧ¡£
ËùÒÔ£¬Ïëµ½ÔÚFirefoxÏÂÓÃFireBugÀ´µ÷ÊÔ¡£¾­¹ýµ÷ÊÔ·¢ÏÖÔÚFirefoxÏ¿ÉÓÃÒÔÏ´úÂëÀ´ÊµÏÖ:
   
document.getElementById("MyIFrame").contentDocument.getElementById("s").style.color="blue";
Ïêϸ´úÂëÈçÏÂ:
TestIFrame.htm:
<html>
<head>
<script type="text/javascript">
function f(){
        var doc;
        if (document.all){//IE
                doc = document.frames["MyIFrame"].document;
        }else{//Firefox   
                doc = document.getElementById("MyIFrame").contentDocument;
        }
        doc.getElementById("s").style.color="blue";
}
</script>
</head>
<body onload="f()">
<iframe id = "MyIFrame" name = "MyIFrame" src = "MyIFrame.htm" width = "100" height="100">
</body>
</html>
MyIFrame.htm:


Ïà¹ØÎĵµ£º

javascript¼ì²âä¯ÀÀÆ÷ÀàÐͺͰ汾

Èç¹û¶ÔjavascriptÁ˽ⲻÊÇÌØ±ðÉîÈëµÄ»°,ºÜÈÝÒ׾ͻáд³ö²»¼æÈݵĴúÂë(¾ÍÏñÎÒ),Õâʱºò¾ÍµÃÅжÏä¯ÀÀÆ÷ÁË¡£±ÈÈçʼþÕìÌý¡¢Ò»Ð©Êó±êºÍ¼üÅÌʼþ¡¢RangeµÈ,һЩ¶¼»á²»Ò»Ñù.ÏÂÃæÁгö¼¸ÖÖ³£Óõļì²âä¯ÀÀÆ÷·½·¨£¬ÒÔ÷ϹÛÖÚ!
¶ÔÏó/ÌØÕ÷¼ì²â·¨
¸Ã·½·¨ÊÇÒ»ÖÖÅжÏä¯ÀÀÆ÷ÄÜÁ¦£¨¶ø·Çä¯ÀÀÆ÷µÄÈ·ÇÐÐͺţ©µÄͨÓ÷½·¨¡£´ó²¿·ÖJSר¼ÒÈÏΪÕâ¸ö·½· ......

JavaScript ¹¹½¨ÀàºÍ´´½¨¶ÔÏóµÄ·½Ê½

1>¹¤³§º¯ÊýÀ´´´½¨¶ÔÏó(Factory)
     function createCar(){
var obj = new Object;
obj.name = "BWM";
obj.show = function(){
alert(this.name);
}
return obj;
}
var car1 = createCar();
var car2 = createCar();
car1.show();
car2.show();
2>¹¹Ô캯Êý´´½¨¶ÔÏó ......

JavaScriptµÄʼþ´úÀí

Èç¹ûÄãÏë½øÒ»²½Á˽âÈçºÎÓÃJavaScriptÀ´ÎªÍøÒ³Ìí¼Ó½»»¥ÐԵϰ£¬ÄãÒ²ÐíÒѾ­Ìý¹ýJavaScriptµÄʼþ´úÀí£¨event delegation£©ÁË£¬²¢ÇÒ»á¾õµÃÖ»ÓÐÄÇЩţ±ÆºæºæµÄJavaScript³ÌÐòÔ±²Å»á¹ØÐÄÕâÑù¸´ÔÓµÄÉè¼ÆÄ£Ê½¡£ÊÂʵÉÏ£¬Èç¹ûÄãÒѾ­ÖªµÀÔõôÑùÈ¥Ìí¼ÓJavaScriptµÄʼþ´¦ÀíÆ÷£¨event handler£©£¬ÊµÏÖʼþ´úÀíÒ²ÊǼþÇá¶øÒ×¾ÙµÄÊÂÇé¡£
J ......

ÈçºÎ±ÜÃâJavascriptʼþ°ó¶¨³öÏÖÄÚ´æÐ¹Â©

"These memory leaks often
occur as a result of circular references between JavaScript objects and
objects within IE’s DOM (document object model)."
GPDE Team Blog
Ã÷ÏÔµÄDOM¶ÔÏóÓë JavaScript¶ÔÏóÑ­»·ÒýÓúܺÃÅжϣ¬ÄѵÄÊÇÒþº¬µÄÑ­»·ÒýÓÃÅжϣ¡
Òþº¬µÄÑ­»·ÒýÓÃÐèҪͨ¹ý×÷ÓÃÓòÁ´½øÐзÖÎöÅÐ ......

JavaScriptÏÔʾʱ¼ä

Õâ¸öÎÊÌâºÜ¼òµ¥£¬Ö÷ÒªÓÐÏÂÃæ¼¸¸ö֪ʶµã£º
£¨1£©       È¡µÃʱ¼ä£ºvar d=new Date();var time=d.toLocaleString()
£¨2£©       ÏÔʾÔÚÍøÒ³ÉÏ£¬¼ÙÉèдÔÚÒ»¸ö<span>ÖУ¬ÇÒ¸Ã<span>µÄidΪshowTime:
document.getElementById("showTime").innerHTML ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ