function chkObject(theVal) {
	if (document.getElementById(theVal) != null) {
		return true;
	} else {
		return false;
	}
}


function changeSize()
{
	document.getElementById("amap").width=document.getElementById("amap").width-10;
}

var currImg = 0;
function ChangeImg(imgid) {
	if(currImg!=0) {
		document.getElementById(currImg).style.display='none';
	}
	document.getElementById(imgid).style.display='block';
	currImg=imgid;
}

var currMap = 'map1';
function UpdateSelect(select_value) {
	if(!select_value) 
		select_value = document.getElementById('selectmap').value;
	else
		document.getElementById('selectmap').value = select_value;

	document.getElementById(currMap).style.display='none';
	currMap = select_value;
	document.getElementById(currMap).style.opacity = 0;
	document.getElementById(currMap).style.filter = "alpha(opacity = 0)";
	if(chkObject('img'+select_value+'1'))
		ChangeImg('img'+select_value+'1');
	doFadeIn1();
}

function doFadeIn1() {
	document.getElementById(currMap).style.display = 'block';
	timerid = setInterval("doFadeIn()",50);
}

function doFadeIn() {
	curropacity = document.getElementById(currMap).style.opacity;
	if(curropacity<1.0) {
		document.getElementById(currMap).style.opacity = curropacity*1 + 0.1*1;
		document.getElementById(currMap).style.filter = "alpha(opacity = " + (curropacity*100 + 10) + ")";
	}
	else
		clearInterval(timerid);
}