var prevFont = 0;
var flag = false;
var flist = [12, 14, 16];
function fontChanger(size) {
		var fNum = 12;
		var iGa = document.getElementById('header_btn').getElementsByTagName('a');
		var iGr = document.getElementById('header_btn').getElementsByTagName('img');
		for(var i=0; i<iGa.length; i++) {
			iGa[i].className = i;
			iGa[i].onclick = function() {
				iGr[prevFont].setAttribute("src", iGr[prevFont].src.replace("_ov.", "_out.") );
				var num = parseInt(this.className);
				document.getElementById('contents').style.fontSize = flist[num]+'px';
				prevFont = num;
				iGr[prevFont].setAttribute("src", iGr[prevFont].src.replace("_out.", "_ov.") );
			}
		}
}

if(window.addEventListener) {
	window.addEventListener("load", fontChanger , false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", fontChanger);
}

function jumpMap(evt) {
	window.open(evt.href, 'subWindow', 'width=500, height=630, menubar=no, toolbar=no, scrollbars=yes, resizable=yes');
}