dom操作之清除text类型的域内容

function clearForm() {
	var formObj = document.forms[0];
	var formEl = formObj.elements;
	for ( var i = 0; i < formEl.length; i++) {
		if (formEl[i].type == 'text') {
			formEl[i].value = '';
		}
	}
	return true;
}