// JavaScript Document
var winW;
function getWidth() {
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape") {
			this.winW = window.innerWidth;
		}
		if (navigator.appName.indexOf("Microsoft")!=-1) {
			this.winW = document.body.offsetWidth;
		}
	}
	return winW;
}

function change_style(id) {
	var element_style=null
	if (document.getElementById) {
		element_style=document.getElementById(id).style;
	} else if (document.all) {
		element_style=document.all[id].style;
	} else if (document.layers) {
		element_style=document.layers[id];
	} 
	if (element_style) {
		var dyn_position;
		if (getWidth() > 970) {
			element_style.left = "50%";
		} else {
			dyn_position = 475;
			element_style.left = dyn_position+"px";
		}		
		
	}
}