function enlarge_photo(img){
	document.getElementById('primary_photo').getElementsByTagName('img')[0].src=img;
}

window.onload = function() {
	var isIE = 0<=window.navigator.userAgent.indexOf("MSIE");
	if(isIE){
		document.documentElement.onscroll = fix_layer;
	}
}

function fix_layer(){
	document.getElementById("logo_shizenjin").style.top=document.documentElement.scrollTop;
}