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 ×îÐÂÎÄÕ : javascript

javascript cookies²Ù×÷


javascript cookies²Ù×÷
<script>
//дcookiesº¯Êý ×÷ÕߣºµÔÕñ¿­
function SetCookie(name,value)//Á½¸ö²ÎÊý£¬Ò»¸öÊÇcookieµÄÃû×Ó£¬Ò»¸öÊÇÖµ
{
    var Days = 30; //´Ë cookie ½«±»±£´æ 30 Ìì
    var exp  = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//È¡cookiesº¯Êý        
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;
}
function delCookie(name)//ɾ³ýcookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}
SetCookie ("xiaoqi", " ......

JavaScriptÑéÖ¤ÕýÔò±í´ïʽ´óÈ«

JavaScriptÑéÖ¤ÕýÔò±í´ïʽ´óÈ«
Æ¥ÅäÖÐÎÄ×Ö·ûµÄÕýÔò±í´ïʽ£º [\u4E00-\uFA29]
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Æ¥Åä¹úÄڵ绰ºÅÂ룺d{3}-d{8}|d{4}-d{7}
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JavaScriptÈ¥³ý¿Õ¸ñµÄÈýÖÖ·½·¨ (trim)

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Æä´Î.Õâ¸ö·½·¨Ê¹ÓÃÁËJavaScript µÄprototype ÊôÐÔ
ÆäʵÄ㲻ʹÓÃÕâ¸öÊôÐÔÒ»Ñù¿ÉÒÔÓú¯ÊýʵÏÖ.µ«ÕâÑù×öºóÓÃÆðÀ´±È½Ï·½±ã.
ÏÂÃæ¾ÍÀ´¿´¿´Õâ¸öÊôÐÔÊÇÔõôÀ´ÓõÄ.
 
·µ»Ø¶ÔÏóÀàÐÍÔ­Ð͵ÄÒýÓá£
objectName.prototype
objectName ²ÎÊýÊǶÔÏóµÄÃû³Æ¡£
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Óà prototype ÊôÐÔÌṩ¶ÔÏóµÄÀàµÄÒ»×é»ù±¾¹¦ÄÜ¡£¶ÔÏóµÄÐÂʵÀý“¼Ì³Ð”¸³Óè¸Ã¶ÔÏóÔ­Ð͵IJÙ×÷¡£
ÀýÈ磬ҪΪ Array ¶ÔÏóÌí¼Ó·µ»ØÊý×éÖÐ×î´óÔªËØÖµµÄ·½·¨¡£ÒªÍê³ÉÕâÒ»µã£¬ÉùÃ÷¸Ãº¯Êý£¬½«Ëü¼ÓÈë Array.prototype£¬²¢Ê¹ÓÃËü¡£
Html´úÂë
function array_max( ){    
var i, max = this[0];    
for (i = 1; i < this.length; i++)    
{    
if (max < this[i])    
max = this[i];    
}    
return max;    
}    
Array.prototype.max = array_max;  &nbs ......

Javascript·ÃÎÊhtmlÒ³ÃæµÄ¿Ø¼þµÄ·½·¨Ïêϸ·ÖÎö

·ÃÎʿؼþµÄÖ÷Òª¶ÔÏóÊÇ:document¶ÔÏó¡£·Ö±ð¶ÔÓ¦µ±Ç°ÎĵµËùÓеģ¨×Ó¶ÔÏ󣩸öÈ˹۵㡣²¢ÇÒÒѾ­ÌṩµÄ¼¸¸öÖ÷Òª·½·¨À´·ÃÎʶÔÏó¡£
1. document.getElementById
2. document.getElementsByName
3 document.getElementsByTagName
4 document.all
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Ò»£®Ê×ÏÈÎÒÀ´Ì¸Ì¸document.getElementByIdµÄÓ÷¨¡£
Var obj=document.getElementById(“ID”) ¸ù¾ÝÖ¸¶¨µÄIDÊôÐÔÖµµÃµ½¶ÔÏó¡£·µ»ØidÊôÐÔÖµµÈÓÚIDµÄµÚÒ»¸ö¶ÔÏóµÄÒýÓ᣼ÙÈç¶ÔÓ¦µÄΪһ×é¶ÔÏó£¬Ôò·µ»Ø¸Ã×é¶ÔÏóÖеĵÚÒ»¸ö¡£
<input name=”a” type=”text” id=”b”/>
<input name=”b” type=”text” id=”a”/>
<input type=”button” name=”submint1” value=”text1” onclick=:”alert(document.getElementById(“b”)/>)”<input type=”button” name=”submint2” value=”text2” onclick=”alert(document.getElementById(“a”)/>)”ÎÒÔÚIEÖвâÊÔÁËÉÏÃæ´ú ......

ÕýÔò±í´ïʽ javascriptÍøÒ³¿ª·¢

´´½¨RegExp¶ÔÏóʵÀýµÄÁ½ÖÖ·½Ê½
 
1.ʹÓÃRegExp¶ÔÏóµÄÏÔʾ¹¹Ô캯Êý,Ó﷨Ϊ:new RegExp("pattern")[,"flags"];
2.ʹÓÃRegExp¶ÔÏóµÄÒþʾ¹¹Ô캯Êý,Ó﷨Ϊ:/pattern/flags;
 
3.flagsΪÒÔϱêÖ¾×Ö·ûµÄ×éºÏ
 
(1).g×÷È«¾Ö±êÖ¾,Èç¹ûûÓÐ,Æ¥ÅäµÚÒ»¸ö
 
(2). i ºöÂÔ´óСд
 
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(1).{n}:¹æ¶¨Ç°ÃæÑ¡ÏîÁ¬Ðø³öÏÖn´Î,o{2}:foooodÆ¥Åä2¸öo
(2).{n,}:¹æ¶¨Ç°ÃæÔªËØ»ò×éºÏÏîÖÁÉÙ³öÏÖn´Î,o{2,},zo²»ÐÐ,zoooo¿ÉÒÔ
(3).{n,m}:¹æ¶¨Ç°ÃæÔªËØÖÁÉÙÁ¬Ðø³öÏÖn´Î,×î¶àm´Î,o{1.3}
(4).+:±ØÐë³öÏÖÒ»´Î»òÁ¬Ðø¶à´Î.µÈЧÓÚ{1,},zo+:z²»ÐÐ,zooÐÐ
(5).*:³öÏÖ0´Î»òÁ¬Ðø¶à´Î,µÈЧ{0,},zo*,zÐÐ,zooÐÐ
(6).?:³öÏÖ0´Î»ò1´Î
2.Ñ¡ÔñÆ¥Åä·û
| : Æ¥ÅäÁ½¸öÑ¡ÏîÖÐÈÎÒâÒ»¸ö,ËüµÄÁ½¸öÑ¡ÏîÊÇ"|"×Ö·ûÁ½±ß¾¡¿ÉÄÜ×î´óµÄ±í´ïʽ.
    chapter|section 1  :Æ¥ÅäµÄÊÇchapter »ò section 1
    (chapter|section) 1 : Æ¥ÅäµÄÊÇchapter 1»ò section 1
  
3.·Ö×é×éºÏºÍ·´Ïò×÷Ó÷û
(1).(pattern):ºÏ³ÉÒ»¸ö×éºÏÏî,°´Ë³Ðò´æÔÚ»º³åÇøÖÐ.(ab);×ÖÃæÒâÒå()ÓÃ,"(",")"
 
(2).\num:µÚ¼¸¸ö ......

javascript µÃµ½µ±Ç°Ò³Ãæ¿ÉÊӸ߶ȺͿí¶È

function getHeight(){
    var yScroll;
    if (window.innerHeight && window.scrollMaxY) {
        yScroll = window.innerHeight + window.scrollMaxY;
    } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
        yScroll = document.body.scrollHeight;
    } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
        yScroll = document.body.offsetHeight;
    }
  
    var windowHeight;
    if (self.innerHeight) { // all except Explorer
        windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
    // Explorer 6 Strict Mode
       window ......
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