幫忙看下這段JS
<input   id= "Button1 "   onmouseover= "this.style.text-decoration:underline "   type= "button "   value= "button "   />
onmousevoer的時候不是這樣添加下滑線的嗎?

------解决方案--------------------
onmouseover= "this.style.textDecoration= 'underline ' "