function writeImg () {
maxImgNum = 2;
imgNum = Math.floor(Math.random()*maxImgNum)+1;

document.write('<img src="../shared/images/aboutImg' + imgNum + '.jpg" width="396" height="396" border="0" alt="">');

}


txtMaxNum = 4;
txtMaxNum2 = 2;
cTxtNum = 1;
cTxtNum2 = 1;

txtNameArray = new Array('rinen','gaiyou','eigyou','bio');

//contNav
if (navigator.appVersion.charAt(0) >= "3") {
	var txtNavImg = new Array();
	for (i=0; i<txtMaxNum; i++) {
		for (j=0; j<txtMaxNum; j++) {
			var tempCNNum = (j>=1) ? j+1 : '';
			txtNavImg[i+j*txtMaxNum] = new Image();
			txtNavImg[i+j*txtMaxNum].src = '../shared/images/about_contnav_' + txtNameArray[i] + tempCNNum + '.gif';
		}
	}
}

function swapTxtNavImg (lctn,imgn) {
	if (navigator.appVersion.charAt(0) >= "3" && (imgn-txtMaxNum+1) != cTxtNum) {
		if (cTxtNum <= 4) {
			document.images[lctn].src = txtNavImg[imgn].src;
		} else if ((imgn-txtMaxNum+1) < 4) {
			document.images[lctn].src = txtNavImg[imgn].src;
		}
	}
}
function swapTxtNavImgRestore (lctn,imgn) {
	if (navigator.appVersion.charAt(0) >= "3" && (imgn+1) != cTxtNum) {
		if (cTxtNum <= 4) {
			document.images[lctn].src = txtNavImg[imgn].src;
		} else if ((imgn+1) < 4) {
			document.images[lctn].src = txtNavImg[imgn].src;
		}
	}
}

//txtNav
if (navigator.appVersion.charAt(0) >= "3") {
	var txtNavImg2 = new Array();
	for (i=0; i<txtMaxNum2; i++) {
		for (j=0; j<txtMaxNum2; j++) {
			var tempTNChar = (j>=1) ? 'c' : '';
			txtNavImg2[i+j*txtMaxNum2] = new Image();
			txtNavImg2[i+j*txtMaxNum2].src = '../shared/images/about_txtnav' + (i+1) + tempTNChar + '.gif';
		}
	}
}

function swapTxtNavImg2 (lctn,imgn) {
	if (navigator.appVersion.charAt(0) >= "3") {
		document.images[lctn].src = txtNavImg2[imgn].src;
	}
}
function swapTxtNavImgRestore2 (lctn,imgn) {
	if (navigator.appVersion.charAt(0) >= "3") {
		document.images[lctn].src = txtNavImg2[imgn].src;
	}
}


function changeTxt (txtNum) {
	if (cTxtNum <= 4 && txtNum <= 4) {
		document.images['txtnav'+cTxtNum].src = txtNavImg[cTxtNum-1].src;
	}
	if (txtNum <= 4) {
		document.images['txtnav'+txtNum].src = txtNavImg[txtNum+(txtMaxNum*2-1)].src;
	}
	if (cTxtNum != 1) {
		hideObj('txt'+cTxtNum);
	}
	if (txtNum != 1) {
		moveObj('txt'+txtNum);
	}
	cTxtNum = txtNum;
}

function showObj(lctn) {
	if (document.all) {
		document.all[lctn].style.visibility = "visible";
	}
	if (navigator.appName.charAt(0) == "N") {
		if (navigator.appVersion.charAt(0) >= 5) {
			document.getElementById(lctn).style.visibility = "visible";
		}
		else {document.layers[lctn].visibility = "show";}
	}
}
function hideObj(lctn) {
	if (document.all) {
		document.all[lctn].style.visibility = "hidden";
	}
	if (navigator.appName.charAt(0) == "N") {
		if (navigator.appVersion.charAt(0) >= 5) {
			document.getElementById(lctn).style.visibility = "hidden";
		}
		else {document.layers[lctn].visibility = "hide";}
	}
}
function getPosition() {
	if (document.all) {
		lPos = Math.floor((document.body.clientWidth - 842) / 2);
		tPos = Math.floor((document.body.clientHeight - 559) / 2);
	}
	else if (document.getElementById) {
		lPos = Math.floor((document.body.clientWidth - 842) / 2);
		tPos = Math.floor((document.body.clientHeight - 559) / 2);
	}
	if (document.layers) {
		lPos = Math.floor((window.innerWidth - 842) / 2);
		tPos = Math.floor((window.innerHeight - 559) / 2);
	}
	lPos = (lPos<0) ? 0 : lPos;
	tPos = (tPos<0) ? 0 : tPos;

	l = lPos + 25 + 396;
	t = tPos + 10 + 25 + 66;
}
function moveObj(lctn) {
	getPosition();
	if (document.all) {
		document.all(lctn).style.left = l + "px";
		document.all(lctn).style.top = t + "px";
		document.all(lctn).style.visibility = "visible";
	}
	else if (document.getElementById) {
		document.getElementById(lctn).style.left = l + "px";
		document.getElementById(lctn).style.top = t + "px";
		document.getElementById(lctn).style.visibility = "visible";
	}
	if (document.layers) {
		document.layers[lctn].left = l;
		document.layers[lctn].top = t;
		document.layers[lctn].visibility = "show";
	}
}
timerID = 10;
function resizeMove () {
	if (cTxtNum != 1) {
	timerID = setTimeout("moveObj('txt'+cTxtNum)",10);
	}
}
window.onresize = resizeMove;