radio,checkbox 与 getElementByName 配合取值

HTML

		<div>
			male<input type="radio"  name="nametest" value="good" checked="checked"/>
			female<input type="radio"  name="nametest" value="bad" />
		</div>
		<div>
			temp1<input type="checkbox"  name="nametest2" value="temp1" checked="checked"/>
			temp2<input type="checkbox"  name="nametest2" value="temp2" />
		</div>

 JS

function show(){
    var temp = document.getElementsByName("nametest");
    for (var i = 0, length = temp.length; i < length; i++) {
        if (temp[i].checked) {
            alert(temp[i].value);
        }
    };
    
    temp = document.getElementsByName("nametest2");
    for (var i = 0, length = temp.length; i < length; i++) {
        if (temp[i].checked) {
            alert(temp[i].value);
        }
    };
}