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javascript trim·½·¨

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Java´úÂë
﹤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(033)

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    When web pages or applications begin to feel slow, analyzing assets as they come over the wire and profiling scripts while they are running allows you to focus your optimization efforts where they are needed most.
    µ±ÍøÒ³»òÓ¦ÓóÌÐò±äÂýʱ£¬·ÖÎ ......

JavaScript±à³Ì±Ê¼Ç

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<script>
 //¼ì²éÊÇ·ñΪÈÎÒâÊý£¨ÊµÊý£©
function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
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javascript prototype½éÉܵÄÎÄÕÂ

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JavaScript ¶ÁÈ¡ JSON


JSON:
[{"subjecttypeId":"1","subjectName":"67","scope":"1",},{"subjecttypeId":"1","subjectName":"345","scope":"1"}]
JavaScript:
       var result = window.eval('(' + JSON+ ')');

for(var p in result){

result[p].subjectName;

alert(result[p] ......
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