代码如下：
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function CountWords (this_field, alertWords, alertChars) { if (alertWords == null) { alertWords = true; } if (alertChars == null) { alertChars = false; } var fullStr = this_field.value; var charCount = fullStr.length; var rExp = /[^A-Za-z0-9]/gi; var spacesStr = fullStr.replace(rExp, " "); var cleanedStr = spacesStr + " "; do { var old_str = cleanedStr; cleanedStr = cleanedStr.replace(" ", " "); } while(old_str != cleanedStr); var splitString = cleanedStr.split(" "); var wordCount = splitString.length -1; if (fullStr.length <1) { wordCount = 0; } if (wordCount == 1) { wordOrWords = " 个单词"; } else { wordOrWords = " 个单词"; } if (charCount == 1) { charOrChars = " 个字符"; } else { charOrChars = " 个字符"; } if (alertWords & alertChars) { alert ("统计结果:\n" + " " + wordCount + wordOrWords + "\n" + " " + charCount + charOrChars); } else { if (alertWords) { alert ("Word Count: " + wordCount + wordOrWords); } else { if (alertChars) { alert ("Character Count: " + charCount + charOrChars); } } } return wordCount; } // End --> </script> <form> <textarea cols=40 rows=5 name=x>