js 实现验证控件效果

Question

没用过你说的控件,是这个意思么??
like this???输入数字报个错<input type="text" id="txt1" value="" /><div id="div1" style="border:blue 1px solid;height=20;width=20;display:inline;visibility:hidden;">no num</div>
<input type="button" id="btn1" value="click" />
<script>
btn1.onclick=function() {if(document.getElementById("txt1").value.search(/\d/)!=-1) {
document.getElementById("div1").style.visibility="visible";
} else {
document.getElementById("div1").style.visibility="hidden";
}
}
</script>

Answer 1

orz的差不多了，大概就是这个逻辑