DHTML中使用attachEvent方法的问题小结
Window对象的attachEvent方法
将指定函数绑定到事件，以便每当该事件在对象上触发时都调用该函数。
<SCRIPT LANGUAGE="JScript">
attachEvent ('onmouseover', Hilite);
attachEvent ('onmouseout', Restore);
function cleanup()
{
detachEvent ('onmouseover', Hilite);
detachEvent ('onmouseout', Restore);
}
function Hilite()
{
if (event.srcElement == element)
{
normalColor = style.color;
runtimeStyle.color = "red";
runtimeStyle.cursor = "hand";
}
}
function Restore()
{
if (event.srcElement == element)
{
runtimeStyle.color = normalColor;
runtimeStyle.cursor = "";
}
}
</SCRIPT>
1、CS文件中构造组合这样与便执行的JS代码
JStr02 += "document.getElementById('txt_AreaCityName').attachEvent('onfocus',MyOnfocus);";
JStr02 += "document.getElementById('txt_AreaCityName').attachEvent('onmouseover',MyOnmouseover);";
JStr02 += "document.getElementById('txt_Author').value ='';";//清空作者
JStr02 += "document.getElementById('txt_AreaCityName').attachEvent('onblur',new Function('MyOnblur(1);'))";
注意怎么使用attachEvent调用带参数的函数的方法可以参考上面红色的这句
找了半天找到的解决办法，看介绍说是javascript的闭包问题，导致得不能直接读取外部的那个函数，不然就所有传递的参数都变为最后一个了。
{
return function()
{
opentree(id,level);//该函数为外部定义的一个执行函数；
}
}
x.attachEvent("onclick",newopen(id,parseInt(level)+1));
y.attachEvent("onclick",newopen(id,parseInt(level)+2));
2、
/// <summary>
/// 执行客户端脚本
/// </summary>
/// <param name="currentPage">Page</param>
/// <param name="strstr">脚本内容</param>
public static void PageExcecScript(System.Web.UI.Page currentPage, string strstr)
{
//脚本块的内容
//先将提示信息中的某些字符做转换，否则会影响脚本的执行
string strDescription = "";
strDescription = strstr.Replace("\"", "\\\"");
strDescription = strstr.Replace("\\", "\\\\");
strDescription = strstr.Replace("\r", "\\r");
strDescription = strstr.Replace("\n", "\\n");
string csname = Guid.NewGuid().ToString();//随机定义脚本块名称
ClientScriptManager cs = currentPage.ClientScript;
if (!cs.IsStartupScriptRegistered(currentPage.GetType(), csname))
{
string cstext = strDescription;
cs.RegisterStartupScript(currentPage.GetType(), csname, cstext, true);
}
}
3、前台ASPX中使用这样的JS
<script type ="text/javascript">
function MyOnfocus()
{
//event.srcElement.value="11";
event.srcElement.select();
}
function MyOnmouseover()
{
event.srcElement.focus();
}
function MyOnblur(state)
{
switch (state)
{
case 1:
if (event.srcElement.value =='') event.srcElement.value='填写展览城市名字';
break;
case 2:
if (event.srcElement.value =='') event.srcElement.value='请输入关键字';
break;
default :
if (event.srcElement.value =='') event.srcElement.value='请按要求填写';
}
}
</script>
************************************
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>新建网页 1</title>
</head>
<body>
<a href="#" id="mylink">这是连接</a>
<script type="text/javascript">
function AttachEvent(type, target, handler, owner)
{
var eventHandler = handler;
if(owner)
{
// 在这里重新定义一个处理函数
eventHander = function(e)
{
handler.call(owner, e);
}
}
if(window.document.all)
target.attachEvent("on" + type, eventHander );
else
target.addEventListener(type, eventHander, false);
}
function MyLink_Click(e)
{
alert(this.name);
var target = e.srcElement || e.target;
alert(target.href);
}
var myobj = new Object();
myobj.name = "这是我的名字";
var mylink = window.document.getElementById("mylink");
AttachEvent("click", mylink, MyLink_Click, myobj);
</script>
</body>
</html>
