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for(i=1;i<=10;i++)
{
      aa[i]=new Array(); //½«Ã¿Ò»¸ö×ÓÔªËØÓÖ¶¨ÒåΪÊý×é
      for(n=0;n<=10;n++)
      {
            aa[i][n]=i+n; //´Ëʱaa[i][n]¿ÉÒÔ¿´×÷ÊÇÒ»¸ö¶þ¼¶Êý×é
      }
} ......

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <center>
            <p>
                <font color="red">±ÏÒµ´ð±ç°²ÅÅ</font></p>
            <table width="600" border="1" cellspacing="0" cellpadding="0" id="table1" style="text-align: center">
        & ......

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src="/i/eg_mouse2.jpg" name="b1"
onmouseOver="mouseOver()"
onmouseOut="mouseOut()" />
</a>
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<img src ="planets.gif" width ="145" height ="126"
alt="Planets"usemap ="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords ="0,0,82,126" href ="sun.htm" target ="_blank"
alt="Sun" />
<area shape ="circle" coords ="90,58,3" href ="mercur.htm" target ="_blank"
alt="Mercury" ......

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function IsNull(){
var str = document.getElementById('str').value.trim();
if(str.length==0){
alert('¶Ô²»Æð£¬Îı¾¿ò²»ÄÜΪ¿Õ»òÕßΪ¿Õ¸ñ!');//Ç뽫“Îı¾¿ò”¸Ä³ÉÄãÐèÒªÑéÖ¤µÄÊôÐÔÃû³Æ!
}
}

//ÅжÏÈÕÆÚÀàÐÍÊÇ·ñΪYYYY-MM-DD¸ñʽµÄÀàÐÍ
function IsDate(){
var str = document.getElementById('str').value.trim();
if(str.length!=0){
var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/;
var r = str.match(reg);
if(r==null)
alert('¶Ô²»Æð£¬ÄúÊäÈëµÄÈÕÆÚ¸ñʽ²»ÕýÈ·!'); //Ç뽫“ÈÕÆÚ”¸Ä³ÉÄãÐèÒªÑéÖ¤µÄÊôÐÔÃû³Æ!
}
}

//ÅжÏÈÕÆÚÀàÐÍÊÇ·ñΪYYYY-MM-DD hh:mm:ss¸ñʽµÄÀàÐÍ
function IsDateTime(){
var str = document.getElementById('str').value.trim();
if(str.length!=0){
var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;
var r = str. ......

javascript»ñÈ¡selectµÄֵȫ½â

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document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text
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window.document.getElementById("bigclass").value
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window.document.getElementById("bigclass").selectedIndex
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<select name="bigclass" id="bigclass" onChange="javascript:updatePage2();">
<option value="" selected="selected">ajaxʵÑé</option>
<option value="4">ÎÒÊÊÒËÊйþ</option>
</select>
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document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text
µÄ½á¹ûÊÇ£ºÎÒÊÊÒËÊйþ
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window.document.getElementById("bigclass").selectedIndex
µÄ½á¹ûÊÇ£º1
Ò»¡¢ÐÂÔöÒ»¸öoption
    var sel=document.getElementById("selectµÄid");
    var op=document.createElement("option");
     op.value=Öµ;
     ......
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