applyElement与appendChild区别的问题？
<SCRIPT>
function   fnApply1(){
var   oNewNode   =document.createElement( " <INPUT       type=button       name=newname  
  value=提交> ");
var   obj=document.getElementById( 'test ');
obj.appendChild(oNewNode);
alert(obj.innerHTML);
}
function   fnApply2(){
var   oNewNode1   =document.createElement( "INPUT   type=button ");
var   obj1=document.getElementById( 'test ');
obj1.applyElement(oNewNode1, "inside ");
alert(obj1.innerHTML);
}
</SCRIPT>
<div   id=test> fsda </div>
<input   type=button> </input>
<INPUT   TYPE= "button "   VALUE= "appendChild "onclick= "fnApply1() ">
<INPUT   TYPE= "button "   VALUE= "applyElement "onclick= "fnApply2() ">
上面代码之上面的按钮可以添加按钮，为什么下面的就不行呢？
applyElement与appendChild具体区别？最好举例


------解决方案--------------------
看看DHTML手册！