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</script>
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 var strM = "javascript is a good script language";
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alert(strM.replace(/a/,"A"));
 </script>
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var strM = "javascript is a good script language";
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alert(strM.replace(/a/g,"A"));
</script>
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 alert(strM.replace(/(javascript)\s*(is)/g,"$1 $2 fun. it $2"));
</script>
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<script language="javascript">
 var strM = "javascript is a good script language";
 function change(word)
{
¡¡return word.indexOf(0).toUpperCase()+word.substring(1);
}
 alert(strM.replace(/\b\w+\b/g,change));
</script>
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