原因:这一句的js语法不对,js看到回车就当是语句结束,
------------
var marqueecontents= ' <font face="Arial" color=#993366 > <strong > <big > 这里有全国32个省市788个频道的电视节目时间表...15,008部影视剧,128,638部网络电视和视频......
找到你喜爱的节目,收看精彩视频与电视节目...发表评论、上传剧照,与其他用户一起分享...最重要的是,这一切全都免费! </big > </strong > </font > ';
-----------
它会当作两句:
第一句
------
var marqueecontents= ' <font face="Arial" color=#993366 > <strong > <big > 这里有全国32个省市788个频道的电视节目时间表...15,008部影视剧,128,638部网络电视和视频......
----------
第二句
---------
找到你喜爱的节目,收看精彩视频与电视节目...发表评论、上传剧照,与其他用户一起分享...最重要的是,这一切全都免费! </big > </strong > </font > ';
-----------解决方法:
后台字符串输出到前台,要进行转码
输出到html里的,为html特殊字符做转码,
输出到js里的,为js特殊字符做转码。附:
jsp的话可以用以下class来做转码:
-------
/*
* Created by Seamus
* Updated on 2004-10-21 by JK
*
*/
package com.jk.util;public class CommStr
{
/**
*replace the old string to new string in the given destination string.
*/
public static java.lang.String strReplace(java.lang.String destStr, java.lang.String oldStr, java.lang.String newStr)
{
if(destStr==null)
return "";
String tmpStr = destStr;
int foundPos = tmpStr.indexOf(oldStr);
while (foundPos>=0)
{
tmpStr = tmpStr.substring(0,foundPos) + newStr + tmpStr.substring(foundPos + oldStr.length(),tmpStr.length());
foundPos = tmpStr.indexOf(oldStr,foundPos+newStr.length());
}
return tmpStr;
} /**
*Encode for HTML.
*/
public static String htmlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(str," "," ");
res_str=strReplace(str,"<","<");
res_str=strReplace(str,">","&rt;");
res_str=strReplace(str,"\"",""");
res_str=strReplace(str,"'","'");
return res_str;
} /**
*Encode for HTML-Text.
*/
public static String htmlTextEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(str,"<","<");
res_str=strReplace(str,">","&rt;");
res_str=strReplace(str,"\"",""");
res_str=strReplace(str,"'","'");
res_str=strReplace(str," "," ");
res_str=strReplace(str,"\r\n","<br>");
res_str=strReplace(str,"\r","<br>");
res_str=strReplace(str,"\n","<br>");
return res_str;
} /**
*Encode for URL.
*/
public static String urlEncoder(String str) {
return java.net.URLEncoder.encode(str) ;
} /**
*Encode for XML.
*/
public static String xmlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(res_str,"<","<");
res_str=strReplace(res_str,">",">");
res_str=strReplace(res_str,"\"", """);
res_str=strReplace(res_str,"\'", "´");
return res_str;
} /**
*Encode for SQL.
*/
public static String sqlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"'","''");
return res_str;
} /**
*Encode for Javascript.
*/
public static String jsEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"\\","\\u005C");
res_str=strReplace(str,"'","\\u0027");
res_str=strReplace(res_str,"\"","\\u0022");
res_str=strReplace(res_str,"\r\n","\\u000A");
res_str=strReplace(res_str,"\n","\\u000A");
res_str=strReplace(res_str,"\r","\\u000A");
res_str=strReplace(res_str,"/","\\u002F");
return res_str;
}
}
------------
var marqueecontents= ' <font face="Arial" color=#993366 > <strong > <big > 这里有全国32个省市788个频道的电视节目时间表...15,008部影视剧,128,638部网络电视和视频......
找到你喜爱的节目,收看精彩视频与电视节目...发表评论、上传剧照,与其他用户一起分享...最重要的是,这一切全都免费! </big > </strong > </font > ';
-----------
它会当作两句:
第一句
------
var marqueecontents= ' <font face="Arial" color=#993366 > <strong > <big > 这里有全国32个省市788个频道的电视节目时间表...15,008部影视剧,128,638部网络电视和视频......
----------
第二句
---------
找到你喜爱的节目,收看精彩视频与电视节目...发表评论、上传剧照,与其他用户一起分享...最重要的是,这一切全都免费! </big > </strong > </font > ';
-----------解决方法:
后台字符串输出到前台,要进行转码
输出到html里的,为html特殊字符做转码,
输出到js里的,为js特殊字符做转码。附:
jsp的话可以用以下class来做转码:
-------
/*
* Created by Seamus
* Updated on 2004-10-21 by JK
*
*/
package com.jk.util;public class CommStr
{
/**
*replace the old string to new string in the given destination string.
*/
public static java.lang.String strReplace(java.lang.String destStr, java.lang.String oldStr, java.lang.String newStr)
{
if(destStr==null)
return "";
String tmpStr = destStr;
int foundPos = tmpStr.indexOf(oldStr);
while (foundPos>=0)
{
tmpStr = tmpStr.substring(0,foundPos) + newStr + tmpStr.substring(foundPos + oldStr.length(),tmpStr.length());
foundPos = tmpStr.indexOf(oldStr,foundPos+newStr.length());
}
return tmpStr;
} /**
*Encode for HTML.
*/
public static String htmlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(str," "," ");
res_str=strReplace(str,"<","<");
res_str=strReplace(str,">","&rt;");
res_str=strReplace(str,"\"",""");
res_str=strReplace(str,"'","'");
return res_str;
} /**
*Encode for HTML-Text.
*/
public static String htmlTextEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(str,"<","<");
res_str=strReplace(str,">","&rt;");
res_str=strReplace(str,"\"",""");
res_str=strReplace(str,"'","'");
res_str=strReplace(str," "," ");
res_str=strReplace(str,"\r\n","<br>");
res_str=strReplace(str,"\r","<br>");
res_str=strReplace(str,"\n","<br>");
return res_str;
} /**
*Encode for URL.
*/
public static String urlEncoder(String str) {
return java.net.URLEncoder.encode(str) ;
} /**
*Encode for XML.
*/
public static String xmlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"&","&");
res_str=strReplace(res_str,"<","<");
res_str=strReplace(res_str,">",">");
res_str=strReplace(res_str,"\"", """);
res_str=strReplace(res_str,"\'", "´");
return res_str;
} /**
*Encode for SQL.
*/
public static String sqlEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"'","''");
return res_str;
} /**
*Encode for Javascript.
*/
public static String jsEncoder(String str)
{
if(str==null || str.equals(""))
return "";
String res_str;
res_str=strReplace(str,"\\","\\u005C");
res_str=strReplace(str,"'","\\u0027");
res_str=strReplace(res_str,"\"","\\u0022");
res_str=strReplace(res_str,"\r\n","\\u000A");
res_str=strReplace(res_str,"\n","\\u000A");
res_str=strReplace(res_str,"\r","\\u000A");
res_str=strReplace(res_str,"/","\\u002F");
return res_str;
}
}
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<head >
<title >文字移动效果 </title >
</head >
<body >
<p >
<center >
<font color="ffaafa" > <h2 >文字移动效果----上下滚动的文本 </h2 > </font >
<hr width=300 >
<p >
<script lanuage="JavaScript" >
var MarqueeWidth=480; //滚动区域限制不起作用
var MarqueeHeight=40;
var speed=3;
var marqueecontents= ' <font face="Arial" color=#993366 > <strong > <big > 这里有全国32个省市788个频道的电视节目时间表...15,008部影视剧,128,638部网络电视和视频......'+
'找到你喜爱的节目,收看精彩视频与电视节目...发表评论、上传剧照,与其他用户一起分享...最重要的是,这一切全都免费! </big > </strong > </font > ';
if(document.all)
{
alert("11111"); //第一个alert能运行
document.write ("<marquee direction=\"up\" scrollAmount=\""+speed+"\" width=\""+MarqueeWidth+"\" height=\""+MarqueeHeight+"\" >"+marqueecontents+"</marquee > \r\n");
alert("22222"); //第二个alert就不能运行了
} </script>
</body >
</html>
原语句:
document.write('<marquee direction="up" scrollAmount='+speed+' stytle="width:'+MarqueeWidth+';height:'+MarqueeHeight+'">'+marqueecontents+'</marquee>');改写后的语句:
document.write (" <marquee direction=\"up\" scrollAmount=\""+speed+"\" width=\""+MarqueeWidth+"\" height=\""+MarqueeHeight+"\"
document.write ("<marquee direction=\"up\" scrollAmount=\""+speed+"\" width=\""+MarqueeWidth+"\" height=\""+MarqueeHeight+"\" >"+marqueecontents+"</marquee > \r\n");
而这个是用''的写法
document.write ('<marquee direction="up" scrollAmount="'+speed+'" width="'+MarqueeWidth+'" height="'+MarqueeHeight+'" >'+marqueecontents+'</marquee > \r\n');