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JavaScriptÌØÐÔ×ܽá

1.js²»Ö§³ÖÖØÔØ£¬ÒòΪjsÀïµÄº¯Êý¶¼ÊÇÒ»¸ö¶ÔÏó£¬jsÀïÓиöÒþº¬¶ÔÏóFunction,ËùÓеÄjsº¯Êý¶¼ÊÇÒ»¸öFunctionÀàÐ͵ĶÔÏó¡£±ÈÈ磺
Java´úÂë
function add(number)   
{   
   alert("hello");   
}  
function add(number)
{
alert("hello");
}
µÈ¼ÛÓÚ
Java´úÂë
var add = new Function("number","alert('hello');");  
var add = new Function("number","alert('hello');");
ÓÉÓÚjsÀïÿһ¸öº¯ÊýÀï¶¼Òþº¬Ò»¸ö¶ÔÏó½Ðarguments,¸ÃargumentsÊÇÒ»¸öÊý×飬ͨ¹ýarguments¿ÉÒÔ»ñµÃµ½Êµ¼Ê´«µÝ²ÎÊýµÄ¸öÊý(arguments.length)¼°Êµ¼Ê´«µÝ²ÎÊýµÄÖµ(arguments[0],arguments[1]...)
ËùÒÔ¿ÉÒÔͨ¹ýarguments¶ÔÏóÀ´Ä£ÄâÖØÔØ£¬ÈçÏ£º
Java´úÂë
function add()   
{   
    if(arguments.length == 1)   
    {   
          alert(arguments[0] + 10);   
    }   
    if(arguments.length == 2)   
    {   
               alert(arguments[0] + arguments[1] + 10);   
    }   
               
    }   
}   
add(5);   
add(5,1);  
function add()
{
if(arguments.length == 1)
{
alert(arguments[0] + 10);
}
if(arguments.length == 2)
{
alert(arguments[0] + arguments[1] + 10);
}

}
}
add(5);
add(5,1);
2.ÿ¸öº¯ÊýµÄÃû×Ö¶¼ÓÐÒ»¸öÊôÐÔ½Ðlength,“ÊôÐÔÃû.length ”»ñµÃ¸Ãº¯ÊýÄܽÓÊܲÎÊýµÄ¸öÊý¡£
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Java´úÂë
function a1()   
{   
}   
function a2(number)   
{   
}   
     


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javascript(±ØÐëÊäÈë¹Ø¼ü×Ö²ÅÄܵã»÷³É¹¦)

<SCRIPT LANGUAGE="JavaScript">
<!--
function limitNum(obj) {
if(obj.value.replace(/\s/g,"")==""||obj.value.replace(/\s/g,"")=="ÊäÈë¹Ø¼ü×Ö")  {
  alert('ÇëÊäÈë¹Ø¼ü×Ö')
      return false;
}
}
//-->
</SCRIPT> 
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JavaScriptÖÐÊý×é·½·¨

shift£ºÉ¾³ýÔ­Êý×éµÚÒ»Ï²¢·µ»ØÉ¾³ýÔªËØµÄÖµ£»Èç¹ûÊý×éΪ¿ÕÔò·µ»Øundefined
var a = [1,2,3,4,5];
var b = a.shift(); //a£º[2,3,4,5]  b£º1
unshift£º½«²ÎÊýÌí¼Óµ½Ô­Êý×鿪ͷ£¬²¢·µ»ØÊý×éµÄ³¤¶È
var a = [1,2,3,4,5];
var b = a.unshift(-2,-1); //a£º[-2,-1,1,2,3,4,5]  b£º7
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javascriptÖÐreplaceÕýÔò±í´ïʽÓï·¨

replace()×î¼òµ¥µÄËãÊÇÄÜÁ¦¾ÍÊǼòµ¥µÄ×Ö·ûÌæ»»¡£
  ʾÀý´úÂëÈçÏ£º
<script language="javascript">
var strM = "javascript is a good script language";
//ÔÚ´ËÎÒÏ뽫×ÖĸaÌæ»»³É×ÖĸA
alert(strM.replace("a","A"));
</script>
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Eclipse¿ª·¢javascript¹¤¾ßjsEclipse½éÉÜ

      EclipseдjavascriptÊDZȽÏÍ´¿àµÄ,ÓÐÁËjsEclipseÕâ¸öÇ¿´óµÄjavascript±à¼­²å¼þ¾Í·½±ã¶àÁË,Õâ¸ö²å¼þÖ§³Ö´úÂëÍê³É,´ó¸Ùä¯ÀÀ,´íÎ󱨸æ,´úÂë»»ÐеȵÈ.
      °²×°jsEclipseºÜ·½±ã,ͨ¹ýHELP-Software Updates-Find and Install ÔÚURLÖмÈëhttp://www.interaktonline. ......
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