HTML静态网页如何向flash文件传递参数

本教程主要介绍HTML网页如何取得形如test.html?foo=mytest的foo参数,以及在HTML网页中如何向swf传递参数。

一、在HTML网页中使用js获取参数。
我们知道HTML页面是在客户端执行的,这样要获取参数必须使用客户端脚本(如Javascript),在这点上不同于服务器端脚本获取参数方式。下面的这段js代码获取HTML网页形如”test.html?foo=mytest&program=flash” “?”后所有参数。


<script language=javascript>
<!--
	var hrefstr,pos,parastr;
	hrefstr = window.location.href;
	pos = hrefstr.indexOf("?");
	parastr = hrefstr.substring(pos+1);
	if (pos>0){
		document.write("所有参数:"+parastr);
	} else {
		document.write("无参数");
	}
//-->
</script>

下面的这段js代码则可以更加细化获取HTML网页某一参数


<script language=javascript>
<!--
	function getparastr(strname)
	{
		var hrefstr,pos,parastr,para,tempstr;
		hrefstr = window.location.href;
		pos = hrefstr.indexOf("?")
		parastr = hrefstr.substring(pos+1);
		para = parastr.split("&");
		tempstr="";
		for(i=0;i<para.length;i++)
		{
			tempstr = para[i];
			pos = tempstr.indexOf("=");
			if(tempstr.substring(0,pos) == strname)
			{
			return tempstr.substring(pos+1);
			}
		}
		return null;
	}
// 获取program参数
	var programstr = getparastr("program");
	document.write(programstr);
//-->
</script>

二、在HTML网页中向swf传递参数。
方法一:在网页中使用js,SetVariable设置flashobject中的变量,代码如:
// “HtmlToSwf”为网页中的flashobject
IDHtmlToSwf.SetVariable(“_root.info_str”,”Happy Newyear”);
方法二:路径参数,如test.swf?foo=happy2005
方法三:使用FlashVars,以下主要介绍FlashVars的用法。使用FlashVars后嵌入HTML的flashobject代码如下:


<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="550" height="400" id="FlashVars" align="middle">
<param name="allowscriptAccess" value="sameDomain" />
<param name="movie" value="FlashVars.swf" />
<param name="FlashVars" value="foo=happy2005&program=flash&language=简体中文-中国" />
<param name="quality" value="high" />
<param name="bgcolor" value="#ffffff" />
<embed src="FlashVars.swf" quality="high" bgcolor="#ffffff" width="550" height="400" name="FlashVars" align="middle" allowscriptAccess="sameDomain" FlashVars="foo=happy2005&program=flash&language=简体中文-中国" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />

通过上面的代码,在SWF(FlashVars.swf)中就可以直接获取foo、program、language变量数据。FlashVars.fla获取FlashVars参数的代码如下:


// 创建三个文本字段 
_root.createTextField("foo_txt",1,0,0,16,16);
_root.createTextField("program_txt",2,0,32,16,16);
_root.createTextField("language_txt",3,0,64,16,16);
foo_txt.autoSize = true;
foo_txt.border = true;
program_txt.autoSize = true;
program_txt.border = true;
language_txt.autoSize = true;
language_txt.border = true;
// 获取FlashVars变量
foo_txt.text = "HTML中的foo参数:"+foo;program_txt.text = "HTML中的program参数:"+program;
language_txt.text = "HTML中的language参数:"+language;

三、两者的有效结合。
在HTML网页中使用js获取参数,然后将获取的参数作为FlashVars写入flashobject传递给swf。代码如下:


<script language=javascript>
<!--
function writeflashobject(parastr) 
{
	document.write("<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase=http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0 width="550" height="400" id="FlashVars" align="middle">n");
	document.write("<param name="allowscriptAccess" value="sameDomain" />n");
	document.write("<param name="movie" value="FlashVars.swf" />n");
	document.write("<param name="FlashVars" value=""+ parastr +"" />n");
	document.write("<param name="quality" value="high" />n");
	document.write("<param name="bgcolor" value="#ffffff" />n");
	document.write("<embed src="FlashVars.swf" quality="high" bgcolor="#ffffff" width="550" height="400" name="FlashVars" align="middle" allowscriptAccess="sameDomain" FlashVars=""+ parastr +"" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />");
	document.write("</object>");
}
function getparastr()
{
	var hrefstr,pos,parastr,para,tempstr1;
	hrefstr = window.location.href;
	pos = hrefstr.indexOf("?") parastr = hrefstr.substring(pos+1);
	return parastr;
}
var parastr = getparastr();
writeflashobject(parastr);
//-->
</script>


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