正则表达式测试器

<HTML>
<HEAD>
<TITLE>Regular Expression Test Page</TITLE>

<!--- Some styles to make the page look nice --->
<STYLE>
  BODY {font-family:arial;font-size:12px}
  INPUT {font-size:11px}
  TEXTAREA {font-size:11px}
  TH {background:#8888FF;color:white;text-align:left}
  TD {background:#CCCC99;color:black;font-size:12px}
  TD.RowA {background:#CCCC99}
  TD.RowB {background:#EEEEBB}
  .header {font-weight:bold}
</STYLE>

<SCRIPT LANGUAGE="JavaScript">
// Turn off fields used only by replace
function hideReplaceFields() {
  document.getElementById('RegExReplace').disabled=true;
  document.getElementById('replaceheader').disabled=true;
}

// Turn on fields used only by replace
function showReplaceFields() {
  document.getElementById('RegExReplace').disabled=false;
  document.getElementById('replaceheader').disabled=false;
}

// Perform a find
function processRegexFind(text, regex, flags) {
    var reg = new RegExp(regex, flags);
    var lastIdx = -1;
    var iCount = 0;
    var result = "";
    var output = '<DIV STYLE="height:200px;overflow-y:auto;550">' +
                 '<TABLE BORDER="0" CELLPADDING="2" CELLSPACING="0" WIDTH="550">' +
                 '<TR><TH WIDTH="*">Match</TH><TH WIDTH="50">Position</TH><TH WIDTH="50">Length</TH></TR>';

    // Loop as long as have matches
    while (lastIdx != 0)
    {
        // Do it
        var mtch = reg.exec(text);
        
        // Check if got one
        if (reg.lastIndex != 0)
        {
            // Yep, increment counter
            iCount++;

            if (iCount % 2)
                style = "RowA";
            else
                style = "RowB";
            // Write output
            output += '<TR CLASS="' + style + '"><TD>' +
                        RegExp.lastMatch + "</TD><TD>" +
                        (reg.lastIndex-RegExp.lastMatch.length) + "</TD><TD>" +
                        RegExp.lastMatch.length + "</TD></TR>";
        }
        
        lastIdx = reg.lastIndex;
    }
    
    output += "</TABLE>";

    // Build result
    if (iCount != 0)
        result = "Matches Found: " + iCount+ "<BR>" + output;
    else
        result = "No matches";        
        
    return result;
}

// Process a replace
function processRegexReplace(text, regexfind, regexreplace, flags) {
    // Define regex
    var re = new RegExp (regexfind, flags) ;
    // Do it
    var newstr = text.replace(re, regexreplace) ;
    // Generate output
    var result = '<DIV STYLE="height:200px;overflow-y:auto;550">' +
                 '<TABLE BORDER="0" CELLPADDING="2" CELLSPACING="0" WIDTH="550">' +
                 '<TR><TH>New Text</TH></TR><TR><TD>' +
                 newstr + '</TD></TR>';

return result;
}

// Process entry point
function processRegex(form) {
    var output="";
    var flags;
    if (form.CaseSensitive.checked)
        flags = "g";
    else
        flags = "gi";

    // What to do?
    if (form.OperationFind.checked) {
        output=processRegexFind(form.SearchText.value, form.RegEx.value, flags);
    }
    else if (form.OperationReplace.checked) {
        output=processRegexReplace(form.SearchText.value, form.RegEx.value, form.RegExReplace.value, flags);
    }

    document.getElementById('output').innerHTML=output;
        
    return false;
}
</SCRIPT>
</HEAD>

<BODY>

<FORM NAME="tester" ACTION="" METHOD="post" onSubmit="processRegex(this);return false">
    
<TABLE BORDER="1" CELLPADDING="4" CELLSPACING="0" WIDTH="550">
  <TR>
    <TH CLASS="Dialog">Regular Expression Tester</TH>
  </TR>
  <TR> 
    <TD CLASS="Dialog"> 

    <!--- Text input for the regular expression itself --->
    <SPAN CLASS="header">Enter a regular expression:</SPAN><BR>
    <INPUT NAME="RegEx" TYPE="Text" SIZE="65" STYLE="font-size:13px">

    <!--- Checkbox to control case-sensitivity --->
    <INPUT TYPE="Checkbox" NAME="CaseSensitive" ID="CaseSensitive" VALUE="Yes">
    <LABEL FOR="CaseSensitive">Case sensitive</LABEL>
    <BR>

    <!--- Radio buttons to display find vs. replace --->
    <INPUT TYPE="Radio" NAME="Operation" ID="OperationFind" VALUE="find" CHECKED onClick="hideReplaceFields()">
    <LABEL FOR="OperationFind">Find</LABEL>
    <INPUT TYPE="Radio" NAME="Operation" ID="OperationReplace" VALUE="replace" onClick="showReplaceFields()">
    <LABEL FOR="OperationReplace">Replace</LABEL>
    <BR>

    <!--- Text input for the replace regular expression --->
    <SPAN CLASS="header" ID="replaceheader">Enter the replace regular expression:</SPAN><BR>
    <INPUT ID="RegExReplace" NAME="RegExReplace" TYPE="Text" SIZE="65" STYLE="font-size:13px">
    <BR><BR>

    <!--- Textarea where user can type the text to search --->  
    <SPAN CLASS="header">And the text you wish to search:</SPAN><BR>
    <TEXTAREA NAME="SearchText" WRAP="off" COLS="70" ROWS="6"></TEXTAREA>
    <BR>

    <!--- Submit button to start the search --->  
    <INPUT NAME="Submit" TYPE="Submit" STYLE="font-weight:bold" VALUE="Match Now"></TD>
  </TR>
</TABLE>
  
</FORM>

<!-- Display any reults here --->
<SPAN id="output"></SPAN> 

<!-- Default to find --->
<SCRIPT LANGUAGE="JavaScript">
hideReplaceFields();
</SCRIPT>

</BODY>
</HTML>
Regular Expression Test Page
Regular Expression Tester
Enter a regular expression: Case sensitive Find Replace Enter the replace regular expression: And the text you wish to search: