我这里有一个 JS 程序，它使用显示 HTML 和 CSS 生成 Code39 条形码来显示白线和黑线。JS 文件很好，但我需要这段代码来生成一部分条形码作为反斜杠。问题是，常规的 Code39 都包含在脚本的数组和函数中，而扩展的 Code39 没有，那是包含反斜杠的部分。（我试图实现的最终结果是输入文档的服务器路径并使其显示在条形码中。）
这可能有助于解释更多关于 Code39 的信息：http ://en.wikipedia.org/wiki/Code_39
好的，这就是我所做的：在barcode.html 文件的第19 行之后，我输入了一个反斜杠。此处输入的任何内容都将显示在两个星号之间的条形码下方，并且当页面加载时，条形码将与下面的数字一致。（我目前在反斜杠上附加了一个全黑的虚拟图案）。在 code39.js 文件的第 357 和 358 行，我添加了带有其他字符的反斜杠（当然使用了两个反斜杠）。我还在下面第 399 行和第 408 行的数组中添加了相同的内容，但我仍然无法让 JS 识别反斜杠，它只是在条形码上不断吐出一个“0”，这是我得到的结果输入了脚本中未指定的值。任何和所有的帮助表示赞赏！
条码.html 文件：
<!DOCTYPE html PUBLIC>
<html>
<head>
<title>Barcode</title>
<script type="text/javascript" src="code39.js"></script>
<style type="text/css">
#barcode {font-weight: normal; font-style: normal; line-height:normal; sans-serif; font-size: 12pt}
</style>
</head>
<body>
Input : 123456<br/>
Barcode : Code39<br/>
Check Digit : 1 (On)<br/><br/>
Output : <br/><br/>
<div id="externalbox" style="width:5in">
<div id="inputdata" >\</div>
</div>
<br />
<script type="text/javascript">
/* <![CDATA[ */
function get_object(id) {
var object = null;
if (document.layers) {
object = document.layers[id];
} else if (document.all) {
object = document.all[id];
} else if (document.getElementById) {
object = document.getElementById(id);
}
return object;
}
get_object("inputdata").innerHTML=DrawCode39Barcode(get_object("inputdata").innerHTML,1);
/* ]]> */
</script>
</body>
</html>
code39.js 脚本文件：
/*
* Code39 barcode
*/
function DrawCode39Barcode(data,
checkDigit)
{
return DrawHTMLBarcode_Code39(data,checkDigit,"yes","in", 0,3,1,3,"bottom","center", "","black","white");
}
function DrawHTMLBarcode_Code39(data,
checkDigit,
humanReadable,
units,
minBarWidth,
width,height,
barWidthRatio,
textLocation,
textAlignment,
textStyle,
foreColor,
backColor)
{
return DrawBarcode_Code39(data,
checkDigit,
humanReadable,
units,
minBarWidth,
width,height,
barWidthRatio,
textLocation,
textAlignment,
textStyle,
foreColor,
backColor,
"html");
}
function DrawBarcode_Code39(data,
checkDigit,
humanReadable,
units,
minBarWidth,
width,height,
barWidthRatio,
textLocation,
textAlignment,
textStyle,
foreColor,
backColor,
mode)
{
if (foreColor==undefined)
foreColor="black";
if (backColor==undefined)
backColor="white";
if (textLocation==undefined)
textLocation="bottom";
else if (textLocation!="bottom" && textLocation!="top")
textLocation="bottom";
if (textAlignment==undefined)
textAlignment="center";
else if (textAlignment!="center" && textAlignment!="left" && textAlignment!="right")
textAlignment="center";
if (textStyle==undefined)
textStyle="";
if (barWidthRatio==undefined)
barWidthRatio=3;
if (height==undefined)
height=1;
else if (height<=0 || height >15)
height=1;
if (width==undefined)
width=3;
else if (width<=0 || width >15)
width=3;
if (minBarWidth==undefined)
minBarWidth=0;
else if (minBarWidth<0 || minBarWidth >2)
minBarWidth=0;
if (units==undefined)
units="in";
else if (units!="in" && units !="cm")
units="in";
if (humanReadable==undefined)
humanReadable="yes";
else if (humanReadable!="yes" && humanReadable !="no")
humanReadable="yes";
var encodedData=EncodeCode39(data,checkDigit);
var humanReadableText = ConnectCode_Encode_Code39(data,checkDigit);
var encodedLength = 0;
var thinLength = 0;
var thickLength = 0.0;
var totalLength = 0.0;
var incrementWidth = 0.0;
var swing = 1;
var result="";
var barWidth=0;
var thickWidth=0.0;
var svg;
if (barWidthRatio >= 2 && barWidthRatio <= 3)
{
}
else
barWidthRatio = 3;
for (x = 0; x < encodedData.length; x++)
{
if (encodedData.substr(x,1) == 't')
{
thinLength++;
encodedLength++;
}
else if (encodedData.substr(x,1) == 'w')
{
thickLength = thickLength + barWidthRatio;
encodedLength = encodedLength + 3;
}
}
totalLength = totalLength + thinLength + thickLength;
if (minBarWidth > 0)
{
barWidth = minBarWidth.toFixed(2);
width=barWidth * totalLength;
}
else
barWidth = (width / totalLength).toFixed(2);
thickWidth = barWidth * 3;
if (barWidthRatio >= 2 && barWidthRatio <= 3.0)
{
thickWidth = barWidth * barWidthRatio;
}
if (mode=="html")
{
if (textAlignment=='center')
result='<div style="text-align:center">';
else if (textAlignment=='left')
result='<div style="text-align:left;">';
else if (textAlignment=='right')
result='<div style="text-align:right;">';
var humanSpan="";
if (humanReadable=='yes' && textLocation=='top')
{
if (textStyle=='')
humanSpan='<span style="font-family : arial; font-size:12pt">'+humanReadableText+'</span><br />';
else
humanSpan='<span style='+textStyle+'>'+humanReadableText+'</span><br />';
}
result=result+humanSpan;
}
for (x = 0; x < encodedData.length; x++)
{
var brush;
if (swing == 0)
brush = backColor;
else
brush = foreColor;
if (encodedData.substr(x,1) == 't')
{
if (mode=="html")
result=result
+'<span style="border-left:'
+barWidth
+units
+' solid '
+brush
+';height:'
+height
+units+';display:inline-block;"></span>';
incrementWidth = incrementWidth + barWidth;
}
else if (encodedData.substr(x,1) == 'w')
{
if (mode=="html")
result=result
+'<span style="border-left :'
+thickWidth
+units+' solid '
+brush
+';height:'
+height
+units+';display:inline-block;"></span>';
incrementWidth = incrementWidth + thickWidth;
}
if (swing == 0)
swing = 1;
else
swing = 0;
}
if (mode=="html")
{
var humanSpan="";
if (humanReadable=='yes' && textLocation=='bottom')
{
if (textStyle=='')
humanSpan='<br /><span style="font-family : arial; font-size:12pt">'+humanReadableText+'</span>';
else
humanSpan='<br /><span style='+textStyle+'>'+humanReadableText+'</span>';
}
result=result+humanSpan+"</div>";
}
return result;
}
function EncodeCode39(data,checkDigit)
{
var fontOutput = ConnectCode_Encode_Code39(data,checkDigit);
var output = "";
var pattern = "";
for (x = 0; x < fontOutput.length; x++)
{
switch (fontOutput.substr(x,1))
{
case '1':
pattern = "wttwttttwt";
break;
case '2':
pattern = "ttwwttttwt";
break;
case '3':
pattern = "wtwwtttttt";
break;
case '4':
pattern = "tttwwtttwt";
break;
case '5':
pattern = "wttwwttttt";
break;
case '6':
pattern = "ttwwwttttt";
break;
case '7':
pattern = "tttwttwtwt";
break;
case '8':
pattern = "wttwttwttt";
break;
case '9':
pattern = "ttwwttwttt";
break;
case '0':
pattern = "tttwwtwttt";
break;
case 'A':
pattern = "wttttwttwt";
break;
case 'B':
pattern = "ttwttwttwt";
break;
case 'C':
pattern = "wtwttwtttt";
break;
case 'D':
pattern = "ttttwwttwt";
break;
case 'E':
pattern = "wtttwwtttt";
break;
case 'F':
pattern = "ttwtwwtttt";
break;
case 'G':
pattern = "tttttwwtwt";
break;
case 'H':
pattern = "wttttwwttt";
break;
case 'I':
pattern = "ttwttwwttt";
break;
case 'J':
pattern = "ttttwwwttt";
break;
case 'K':
pattern = "wttttttwwt";
break;
case 'L':
pattern = "ttwttttwwt";
break;
case 'M':
pattern = "wtwttttwtt";
break;
case 'N':
pattern = "ttttwttwwt";
break;
case 'O':
pattern = "wtttwttwtt";
break;
case 'P':
pattern = "ttwtwttwtt";
break;
case 'Q':
pattern = "ttttttwwwt";
break;
case 'R':
pattern = "wtttttwwtt";
break;
case 'S':
pattern = "ttwtttwwtt";
break;
case 'T':
pattern = "ttttwtwwtt";
break;
case 'U':
pattern = "wwttttttwt";
break;
case 'V':
pattern = "twwtttttwt";
break;
case 'W':
pattern = "wwwttttttt";
break;
case 'X':
pattern = "twttwtttwt";
break;
case 'Y':
pattern = "wwttwttttt";
break;
case 'Z':
pattern = "twwtwttttt";
break;
case '-':
pattern = "twttttwtwt";
break;
case '.':
pattern = "wwttttwttt";
break;
case ' ':
pattern = "twwtttwttt";
break;
case '*':
pattern = "twttwtwttt";
break;
case '$':
pattern = "twtwtwtttt";
break;
case '/':
pattern = "twtwtttwtt";
break;
case '+':
pattern = "twtttwtwtt";
break;
case '%':
pattern = "tttwtwtwtt";
break;
case '\\':
pattern = "tttttttttt";
break;
default : break;
}
output=output+pattern;
}
return output;
}
function ConnectCode_Encode_Code39(data,checkDigit)
{
var Result="";
var cd="";
var filtereddata="";
filtereddata = filterInput(data);
var filteredlength = filtereddata.length;
if (checkDigit==1)
{
if (filteredlength > 254)
{
filtereddata = filtereddata.substr(0,254);
}
cd = generateCheckDigit(filtereddata);
}
else
{
if (filteredlength > 255)
{
filtereddata = filtereddata.substr(0,255);
}
}
Result = "*" + filtereddata+cd+"*";
Result=html_decode(html_escape(Result));
return Result;
}
function getCode39Character(inputdecimal) {
var CODE39MAP=new Array("0","1","2","3","4","5","6","7","8","9",
"A","B","C","D","E","F","G","H","I","J",
"K","L","M","N","O","P","Q","R","S","T",
"U","V","W","X","Y","Z","-","."," ","$",
"/","+","%","\\");
return CODE39MAP[inputdecimal];
}
function getCode39Value(inputchar) {
var CODE39MAP=new Array("0","1","2","3","4","5","6","7","8","9",
"A","B","C","D","E","F","G","H","I","J",
"K","L","M","N","O","P","Q","R","S","T",
"U","V","W","X","Y","Z","-","."," ","$",
"/","+","%","\\");
var RVal=-1;
for (i=0;i<43;i++)
{
if (inputchar==CODE39MAP[i])
{
RVal=i;
}
}
return RVal;
}
function filterInput(data)
{
var Result="";
var datalength=data.length;
for (x=0;x<datalength;x++)
{
if (getCode39Value(data.substr(x,1)) != -1)
{
Result = Result + data.substr(x,1);
}
}
return Result;
}
function generateCheckDigit(data)
{
var Result="";
var datalength=data.length;
var sumValue=0;
for (x=0;x<datalength;x++)
{
sumValue=sumValue+getCode39Value(data.substr(x,1));
}
sumValue=sumValue % 43;
return getCode39Character(sumValue);
}
function html_escape(data)
{
var Result="";
for (x=0;x<data.length;x++)
{
Result=Result+"&#"+data.charCodeAt(x).toString()+";";
}
return Result;
}
function html_decode(str) {
var ta=document.createElement("textarea");
ta.innerHTML=str.replace(/</g,"<").replace(/>/g,">");
return ta.value;
}