js 正则表达式，层创建验证

<script type="text/javascript">
function $(id)
{
return document.getElementById(id);
}
function cdiv(e,regs,messucc,mesfail){
///无值的话
var reg = new RegExp(regs, "igm");
var messucc="<a href='#'>"+messucc+"</a>";// 正确的提示
var mesfail = "<a href='#'>"+mesfail+"</a>";//错误的提示
var t=e.offsetTop;
var l=e.offsetLeft;
var ee=e;
while(ee=ee.offsetParent)
{
t+=ee.offsetTop;
l+=ee.offsetLeft;
}
if(!reg.test(e.value))
{

if($('div1'+e.id)==undefined)
{
var createDiv = document.createElement("div");
createDiv.style.border = "1px solid #ccc";
createDiv.setAttribute("id",'div1'+e.id);
createDiv.style.background = "#f60";
createDiv.setAttribute("position","absolute");
createDiv.style.height = 10;
createDiv.style.width = 100;
createDiv.style.top =t;
///获取文本框后面的坐标
createDiv.style.left =l+e.offsetWidth+3;
createDiv.style.position ="absolute";

createDiv.innerHTML=mesfail;//"<a href='#'>faile</a>"


var tlink = document.getElementById("tlink");
var parent = tlink.parentNode;
if(parent.lastChild == tlink) {
parent.appendChild(createDiv);
} else {
parent.insertBefore(createDiv, tlink.nextSibling);
}

}
else
{
$('div1'+e.id).innerHTML=mesfail;
}
}
///通过的的话
else
{
if($('div1'+e.id)==undefined)
{
var createDiv = document.createElement("div");
createDiv.style.border = "1px solid #ccc";
createDiv.setAttribute("id",'div1'+e.id);
createDiv.style.background = "#f60";
createDiv.setAttribute("position","absolute");
createDiv.style.height = 10;
createDiv.style.width = 100;
createDiv.style.top =t;
///获取文本框后面的坐标
createDiv.style.left =l+e.offsetWidth+3;
createDiv.style.position ="absolute";

createDiv.innerHTML=messucc;


var tlink = document.getElementById("tlink");
var parent = tlink.parentNode;
if(parent.lastChild == tlink) {
parent.appendChild(createDiv);
} else {
parent.insertBefore(createDiv, tlink.nextSibling);
}

}
else
{
$('div1'+e.id).innerHTML=messucc;
}
}

}

</script>
<table width="525" height="138" >
<tr><td height="106">&nbsp;</td>
<td></td></tr><tr><td><input name="text" type="text" id="tlink" onblur="cdiv(this,'^\\d+$','success','fail')" width="60px" /></td><td></td></tr></table>