 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 
<style type="text/css"> 
/* Reset style */ 
* { margin:0; padding:0;} 
.input_ocurrent { padding:2px; border:1px solid #DDD; background:#FFF;} 
.input_ocurrent:hover, .input_ocurrent:focus { border:1px solid #444; background:#DDD;} 
.input_current { padding:2px; border:1px solid #444; background:#DDD;} 
</style> 
<script type="text/javascript"> 
function displayInput(elementID) { 
//得到span標(biāo)簽的集合 
var spanzone = document.getElementsByTagName("span"); 
//得到span標(biāo)簽的數(shù)量(放到for里邊會重復(fù)計算) 
var spanlength=spanzone.length; 
var inputzone;//你所需要的那個span 
for(var i=0;i<spanlength;i++) 
{ 
//得到你想找的這個 
if(spanzone[i].className==elementID) 
{ 
inputzone=spanzone[i]; 
} 
} 
//得到span標(biāo)簽的input標(biāo)簽集合 
var inputTx=inputzone.getElementsByTagName("input"); 
//span里邊的input的集合數(shù)量(單獨寫防止重復(fù)計算) 
var inputLength=inputTx.length; 
for (var i=0;i <inputLength; i++) { 
//動態(tài)添加onmouseover事件:當(dāng)鼠標(biāo)移到input上的時候判斷這個inpu的class是不是input_ocurrent 如果是的話就添加onmouseover事件 移出同理 
if (inputTx[i].className =="input_ocurrent"){ 
inputTx[i].onmouseover=function() { 
this.className ="input_current"; 
} 
inputTx[i].onmouseout=function() { 
this.className ="input_ocurrent"; 
} 
} 
} 
} 
window.onload =function() { 
displayInput("input_zone"); 
} 
</script> 
</head> 
<body> 
<span class="input_zone"> 
<input class="input_ocurrent" name="" type="text" size=""/> 
<input class="input_ocurrent" name="" type="text" size=""/> 
</span> 
</body> 
</html> 