xiaojue/html

## html
<html>
<body>
<form name="frmMain">
  <input name="fireTarget">
  <input type="hidden" name="output">
</form>
<script>
function changeRealElement () {
var torgand = document.frmMain["fireTarget"];
var realElem = document.frmMain["output"];
realElem.value = torgand.value;
console.log(realElem.value);
}

function _onload () {
var torgand = document.frmMain["fireTarget"];
if(window.attachEvent) { // IE
torgand.attachEvent('onpropertychange',changeRealElement);
}else{ // Firfox
torgand.addEventListener('input',changeRealElement,false);
}
}
_onload();
</script>
</body>
</html>
	<html>
	<body>
	<form name="frmMain">
	<input name="fireTarget">
	<input type="hidden" name="output">
	</form>
	<script>
	function changeRealElement () {
	var torgand = document.frmMain["fireTarget"];
	var realElem = document.frmMain["output"];
	realElem.value = torgand.value;
	console.log(realElem.value);
	}

	function _onload () {
	var torgand = document.frmMain["fireTarget"];
	if(window.attachEvent) { // IE
	torgand.attachEvent('onpropertychange',changeRealElement);
	}else{ // Firfox
	torgand.addEventListener('input',changeRealElement,false);
	}
	}
	_onload();
	</script>
	</body>
	</html>