<div ><input type="text" name="text" value="" id="a" /></div>
<div id="b"></div> <input type="button" value="提交" onclick="test();" /> function test(){
var a=document.getElementById("a");
var b=document.getElementById("b");
b.innerHTML=a.value;
}
<div id="b"></div> <input type="button" value="提交" onclick="test();" /> function test(){
var a=document.getElementById("a");
var b=document.getElementById("b");
b.innerHTML=a.value;
}
<div id="b"></div>
<input type="button" value="提交" onclick="test();" /> function test(){
var a=document.getElementById("a");
var b=document.getElementById("b");
b.innerHTML=a.innerHTML;
b.children[0].value = a.children[0].value;
}