function rszHandler() {
	var winW = 0;
	var winH = 0;
	var woff = 0;
	var hoff = 0;
	var soff = 20;
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape" || navigator.appName=='Opera') {
			winW = window.innerWidth;
			winH = window.innerHeight;
			soff = 18;
		}
		if (navigator.appName.indexOf("Microsoft") != -1) {
			winW = document.body.offsetWidth;
			winH = document.body.offsetHeight;
		}
		if (winH < 650) {
			winW -= soff;
		}
		if (winW < 980) {
			winW = 980;
			winH -= soff;
		}
	}
	if (winW > 980 - woff) {
		document.getElementById("if").style.width = winW - woff + 'px';
	} else {
		document.getElementById("if").style.width = '980px';
	}
	if (winH > 650 - hoff) {
		document.getElementById("if").style.height = winH - hoff + 'px';
	} else {
		document.getElementById("if").style.height = '650px';
	}
}
window.onload = rszHandler;
window.onresize = rszHandler;