var tar;
var mw = 800;
var mh = 750;

function setTar(){
	tar = document.getElementById("flash");
	checkWin();
}
function setTimer(){
	var _timer = setTimeout("checkWin()", 100);
}

function checkWin(){
	var size = getWinsize();
	tar.style.width = (size.w > mw)? "100%": mw + "px";
	tar.style.height = (size.h > mh)? "100%": mh + "px";
	setTimer();
}

function getWinsize(){
	var _obj = new Object();
	if(window.innerHeight){
		_obj.w = window.innerWidth;
		_obj.h = window.innerHeight;
	}else if (document.all && document.getElementById && (document.compatMode=='CSS1Compat')) {

		_obj.w = window.clientWidth;

		_obj.h = document.documentElement.clientHeight;

	}else if(document.body.clientHeight){

		_obj.w = document.body.clientWidth;

		_obj.h = document.body.clientHeight;

	}else{

		_obj.w = 0;

		_obj.h = 0;

	}

	return _obj;

}