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﹤scriptlanguage=”javascript”﹥   
/**  
*ɾ³ý×óÓÒÁ½¶ËµÄ¿Õ¸ñ  
*/  
String.prototype.trim=function(){      
    return this.replace(/(^\s*)|(\s*$)/g, '');   
}     
/**  
*ɾ³ý×ó±ßµÄ¿Õ¸ñ  
*/  
String.prototype.ltrim=function()   
{   
  return this.replace(/(^s*)/g,'');   
}   
/**  
*ɾ³ýÓұߵĿոñ  
*/  
String.prototype.rtrim=function()   
{   
  return this.replace(/(s*$)/g,'');   
}   
﹤/script﹥  
﹤scriptlanguage=”javascript”﹥
/**
*ɾ³ý×óÓÒÁ½¶ËµÄ¿Õ¸ñ
*/
String.prototype.trim=function(){
return this.replace(/(^\s*)|(\s*$)/g, '');
}
/**
*ɾ³ý×ó±ßµÄ¿Õ¸ñ
*/
String.prototype.ltrim=function()
{
return this.replace(/(^s*)/g,'');
}
/**
*ɾ³ýÓұߵĿոñ
*/
String.prototype.rtrim=function()
{
return this.replace(/(s*$)/g,'');
}
﹤/script﹥
ʹÓÃÈçÏÂ
Java´úÂë
﹤scripttype=”text/javascript”﹥   
  alert(document.getElementById(’abc’).value.trim());   
  alert(document.getElementById(’abc’).value.ltrim());   
  alert(document.getElementById(’abc’).value.rtrim());   
﹤/script﹥  


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[·­Òë]High Performance JavaScript(023)

Data Formats  Êý¾Ý¸ñʽ
    When considering data transmission techniques, you must take into account several factors: feature set, compatibility, performance, and direction (to or from the server). When considering data formats, the only scale you need for comparison is speed.
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Use the Fast Parts  ʹÓÃËÙ¶È¿ìµÄ²¿·Ö
    Even though JavaScript is often blamed for being slow, there are parts of the language that are incredibly fast. This should come as no surprise, since JavaScript engines are built in lower-level languages and are therefore compiled. Thou ......

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