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function isNumber(str){
    var mynumber="0123456789";
    for(var i=0;i<str.length;i++){
        var c=str.charAt(i);
        if(mynumber.indexOf(c)==-1){
            return false;
        }
    }
    return true;
}


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JSON(JavaScript Object Notation) ÊÇÒ»ÖÖÇáÁ¿¼¶µÄÊý¾Ý½»»»¸ñʽ£¬Ò×ÓÚÔĶÁºÍ±àд£¬Í¬Ê±Ò²Ò×ÓÚ»úÆ÷½âÎöºÍÉú³É¡£Ëü»ùÓÚECMA262ÓïÑԹ淶£¨1999-12µÚÈý°æ£©ÖÐJavaScript±à³ÌÓïÑÔµÄÒ»¸ö×Ó¼¯¡£ JSON²ÉÓÃÓë±à³ÌÓïÑÔÎ޹صÄÎı¾¸ñʽ£¬µ«ÊÇҲʹÓÃÁËÀàCÓïÑÔ£¨°üÀ¨C£¬ C++£¬ C#£¬ Java£¬ JavaScript£¬ Perl£¬ PythonµÈ£©µÄϰ¹ß£¬ÕâÐ©ÌØÐ ......

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1. timeplot
µØÖ·£ºhttp://www.simile-widgets.org/timeplot/
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2.flot
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JavaScript HashTable

/**
* ×Ô¼ºµÄ HashTable
* Ô¸½Å±¾ÉñÁ¦ÓëÄãͬÔÚ
*/
function HashTable(){
var values = {};

/** ½«Öµ²åÈë HashTable ÖÐ **/
this.put = function(key, value){
if(key in values){
return false;
}
values[key] = value;
}
/** ¸ù¾Ý key ·µ»Ø value **/
this.find = function(key){
ret ......

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µ«ÊÇÔÚ IEä¯ÀÀÆ÷ÖÐ×ÜÊDZ¨Ò»¸ö  value Õâ¸ö¶ÔÏó²»´æÔÚ
µ«ÊÇ ÔÚ »ðºüä¯ÀÀÆ÷ÖÐʹÓà document.forms[0].elemets["date"].value; ¿ÉÒÔ
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