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<title>无标题文档</title>
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<form>
中华民国成立于哪一年？<input type="text" daan="1912年" value="" id="t1" name="t1" /><input type="button" onclick="check()" id="t2" name="t2" value="检查答案" />
</form>
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</html>
<script>
function check()
{
var a=document.getElementById("t1");
var a1=a.value;
var b=a.getAttribute("daan");
if(a1==b)
{
alert("恭喜你答对了")}
else
{
alert("笨蛋！")
}
}
</script>
