Javascript 两个窗体之间传值实现代码 |
本文标签:窗体之间,传值 如我们新建窗体FatherPage.htm: XML-Code: 复制代码 代码如下: <script type="text/javascript"> function OpenChildWindow() { window.open(ChildPage.htm); } </script> <input type="text" id="txtInput" /> <input type="button" value="OpenChild" onclick="OpenChildWindow()" /> 然后在ChildPage.htm中即可通过window.opener来访问父窗体中的元素: XML-Code: 复制代码 代码如下: <script type="text/javascript"> function SetValue() { window.opener.document.getElementById(txtInput).value =document.getElementById(txtInput).value; window.close(); } </script> <input type="text" id="txtInput" /> <input type="button" value="SetFather" onclick="SetValue()" /> 其实在打开子窗体的同时,我们也可以对子窗体的元素进行赋值,因为window.open函数同样会返回一个子窗体的引用,因此FatherPage.htm可以修改为: XML-Code: 复制代码 代码如下: <script type="text/javascript"> function OpenChildWindow() { var child = window.open(ChildPage.htm); child.document.getElementById(txtInput).value =document.getElementById(txtInput).value; } </script> <input type="text" id="txtInput" /> <input type="button" value="OpenChild" onclick="OpenChildWindow()" /> 通过判断子窗体的引用是否为空,我们还可以控制使其只能打开一个子窗体: XML-Code: 复制代码 代码如下: <script type="text/javascript"> var child function OpenChildWindow() { if(!child) child = window.open(ChildPage.htm); child.document.getElementById(txtInput).value =document.getElementById(txtInput).value; } </script> <input type="text" id="txtInput" /> <input type="button" value="OpenChild" onclick="OpenChildWindow()" /> 光这样还不够,当关闭子窗体时还必须对父窗体的child变量进行清空,否则打开子窗体后再关闭就无法再重新打开了: XML-Code: 复制代码 代码如下: <body onunload="Unload()"> <script type="text/javascript"> function SetValue() { window.opener.document.getElementById(txtInput).value =document.getElementById(txtInput).value; window.close(); } function Unload() { window.opener.child=null; } </script> <input type="text" id="txtInput" /> <input type="button" value="SetFather" onclick="SetValue()" /> </body> |