javascript标签的id属性

转:http://countme.iteye.com/blog/1143778

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312">
<title>script中的id</title>
<script id="click_script" type="text/javascript">
	function button_onclick(){ 
		document.getElementById("textarea").value=document.getElementById("click_script").innerHTML;
		alert( "helloworld!"); 
	} 
</script>
</head>
<body>
	<input type="button" value="helloworld" onclick="button_onclick()">
	<textarea rows="10" cols="80" id="textarea" name="textarea"> 
</textarea>
</body>
</htmL>

 

可以利用script的id属性俩实现script的预加载效果

<script type="text/javascript" src="" id="my"></script>   
<script>   
setTimeout("document.getElementById('my').src='http://localhost:8080/test/b.js'; ",3000);//延时3秒   
</script>
//b.js
alert("aa");

 

 

在项目中有这样使用SCRIPT的ID属性的:

如在JSP页面定义:

<script language="javascript" id="getValue"></script>

<script language="javascript" src="../js/storein.js"></script>

再在storein.js中可能有下面的代码:

var thetime = new Date ();

getValue.src="storeInAction.do?method=getGrossNet&tmp="+thetime.getHours()+thetime.getMinutes()+thetime.getSeconds();
上面的getValue.src方法向后台请求getGrossNet方法,该方法如下 

 

public ActionForward getGrossNet(ActionMapping mapping,ActionForm form,
									 HttpServletRequest request,HttpServletResponse response) throws Exception
	{
		response.setContentType("text/html; charset=GBK");
		PrintWriter out=response.getWriter();
		out.println("storeInHeadForm.grossWt.value='"+GM.format(gross)+"';");
				
		out.flush();
		return null;
	}

 

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