JavaScript为span标签赋值的三种常用方式

<body onload="s()">
<span id="hello"></span>
<script language="javascript">
 function s(){
document.getElementById("hello").innerHTML = "<iframe src= height=400 width=300></iframe>";
}
 </script>

<body onload="s()">
<span id="hello"></span>
<script language="javascript">
 function s(){
document.getElementById("hello").innerText = "hello world";
}
</script>

<span name="currentDate"></span> （多个span） 

<script> 
$(document).ready(function() { 
var currentDate = new Date().toLocaleDateString(); 
$("span[name='currentDate']").each(function() { 
$(this).text(currentDate); 
}); 
}); 
</script>