【示例】
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JS
window.onload = function(){ var _clearText = document.getElementById("clearText"); _clearText.onclick = function(){//为清空的文本绑定时间事件 var _elements = document.getElementById("clearFrom").elements,//设置表单中所有文本型的成员的值为空 _elementsLen = _elements.length, _ei = null, i = 0; for (; i < _elementsLen ; i++){//遍历元素 _ei = _elements[i]; (_ei.type == "text" || _ei.type == "textarea") && (_ei.value = ""); } } };