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<input type="text" name="mytxt" value="   12345678    " /><br>
<input type="button" name="cmd1" onclick="mytxt2.value=mytxt.value.trim()" value="È¥Á½±ßµÄ¿Õ¸ñ"/>
<input type="text" name="mytxt2"/><br>
<input type="button" name="cmd1" onclick="mytxt3.value=mytxt.value.ltrim()" value="È¥×ó±ßµÄ¿Õ¸ñ"/>
<input type="text" name="mytxt3"/><br>
<input type="button" name="cmd1" onclick="mytxt4.value=mytxt.value.rtrim()" value="È¥ÓұߵĿոñ"/>
<input type="text" name="mytxt4"/><br>
<script language="javascript">
String.prototype.trim=function(){
        return this.replace(/(^s*)|(s*$)/g, "");
}
String.prototype.ltrim=function(){
        return this.replace(/(^s*)/g,"");
}
String.prototype.rtrim=function(){
        return this.replace(/(s*$)/g,"");
}
</script>
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<script type="text/javascript">
function trim(str){  //ɾ³ý×óÓÒÁ½¶ËµÄ¿Õ¸ñ
 return str.replace(/(^s*)|(s*$)/g, "");
}
function ltrim(str){  //ɾ³ý×ó±ßµÄ¿Õ¸ñ
 return str.replace(/(^s*)/g,"");
}
function rtrim(str){  //ɾ³ýÓұߵĿոñ
 return str.replace(/(s*$)/g,"");
}
</script>


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    One of the classic computer science problems is determining where data should be stored for optimal reading and writing. Where data is stored is related to how quickly it can be retrieved during code execution. This problem in JavaScri ......

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function test(){
var m=n=1;
alert(m);
}
alert(n);
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function test(){
var m=n=1;
alert(m);
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alert(n);
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