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     eg:
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     alert(urlStr);
2, decodeURI·½·¨
    ¶ÔURI±àÂë½øÐнâÂë³Â×î³õʼµÄ×Ö·û´®²¢·µ»Ø
3£¬parseInt·½·¨
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    eg:
    parseInt('123abc',10); //½á¹ûΪ123
4£¬parseFloat·½·¨£ºÈôת»»Ê§°Ü£¬Ôò·µ»ØNaN
5£¬isNaN·½·¨  ---ÓµÓмì²âparseIntºÍparseFloat·½·¨µÄ·µ»ØÖµÊÇ·ñÊÇNaN (Not a Number)
     ×¢Ò⣺ÅжÏÒ»¸öÊýÊÇ·ñÊÇNaN²»ÄÜÕâÑù£¬if(xx == NaN)£¬Ö»ÄÜÓø÷½·¨½øÐÐÅжϣ¬È磺
     alert(NaN == NaN);  //·Ç³£Ææ¹Ö£¬ÕâÀïµÄ½á¹ûÊÇfalse
     alert(isNaN(NaN));   //true
6£¬escape·½·¨
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function openCheck()
{
if (!this.external)
{
app.alert("Acrobat¤Ç¤Ï実ÐФǤ­¤Þ¤»¤ó");
this.closeDoc(true);
// var myDoc = event.target;
// myDoc.closeDoc(true);
}
}
openCheck();
 
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 function upload() {
  var form = document.getElementById('topic');
  if ($('uploadfile').value == "") {
   alert("ÇëÑ¡ÔñÎļþ£¡");
   return;
  } 
  $('uploadfile').value = escape($('uploadfile').value) ......
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