window.onload = function(){setScreenClass();};
window.onresize = function(){setScreenClass();};

function setScreenClass(){
	if (parseFloat(navigator.appVersion) == 4) {
	var fmt = document.body.clientWidth;
	} else {
	var fmt = document.documentElement.clientWidth;
	}
	if (fmt <= 970) {
		document.getElementById("header-wrap").style.width="970px";
		document.getElementById("layout").style.width="970px";
	} else {
		document.getElementById("header-wrap").style.width="auto";
		document.getElementById("layout").style.width="auto";
	}
}