function thisYear(){
		var day=new Date();
		var year=day.getFullYear();
		if(document.getElementById("copyrightyear")){
				document.getElementById("copyrightyear").innerHTML=year;
		}
}

function addEvent(){
			try {
			window.addEventListener('load', this.thisYear, false);
		} catch (e) {
			window.attachEvent('onload', this.thisYear);
		}
}
addEvent();