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javascript 获取iframe里页面中元素值的方法

IE方法：
document.frames[myFrame].document.getElementById(test).value;

火狐方法：
document.getElementById(myFrame).contentWindow.document.getElementById(test).value;

IE、火狐方法：

复制代码 代码如下:

    function getValue(){


         var tmp = ;


         if(document.frames){


                tmp += ie哥说：;


                tmp += document.frames[myFrame].document.getElementById(test).value;


         }else{


                tmp = document.getElementById(myFrame).contentWindow.document.getElementById(test).value;


         }


         alert(tmp);


    }


示例代码：
a.html页面中的代码
复制代码 代码如下:

<html>
            <head>
                <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
                <title>
                    javascript 获取iframe里页面中元素的值 测试
                </title>
           </head>
           <body>
                <iframe id="myFrame" src=b.html style="width:300px;height: 50px;"></iframe>
                <input type="button" id="btn" onclick="getValue()" value="test" >
                <script type="text/javascript">
                        function getValue(){
                            var tmp = ;
                            if(document.frames){
                                    tmp += ie哥说：;
                                    tmp += document.frames[myFrame].document.getElementById(test).value;
                            }else{
                                    tmp = document.getElementById(myFrame).contentWindow.document.getElementById(test).value;
                            }
                            alert(tmp);
                        }
                </script>
            </body>
        </html>

b.html页面中的代码
复制代码 代码如下:

       <html>
            <head>
                <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
                <title>
                    我是 iframe内的页面
                </title>
            </head>
            <body>
                <input type=text id="test" value=欢迎访问：justflyhigh.com>
            </body>
        </html>