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存取iframe元素

$(function () {
$('#_iframe').load(function () {
var $iframe = $(this),
$contents = $iframe.contents();

// 取得 iframe 中的元素
var t1 = $contents.find('#t1').val();
// 取得 radio checked value
var checkedVal = $contents.find("[name='uploadType']:checked").val();

// 設定 iframe 中的元素
$contents.find('#t2').val('我的值是由外部指定的!!');
$contents.find('#t2').css('color', 'red');

// 控制 iframe 中的按鈕觸發事件
$contents.find('#sbtn1').click();

// 執行 iframe 中定義的方法
$iframe.get(0).contentWindow.iframeMethod();

// 執行各種動作時可以再判斷 $contents 是否為 null
});
});

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