var myWidth = 0;
var myHeight = 0;
var halfScreenHeight = 0;

function determineSize() {
	// determines the inner size of the browser window
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	}
	halfScreenHeight = Math.floor(myHeight / 2);
}





function positionContentDIV(divID, vertAdjust) {
	// sets the Top of a given element based on an adjustment from vertical center
	topPoint = halfScreenHeight - vertAdjust;
	if (topPoint < 82) {
		topPoint = 82;
	}
	topPoint += "px";
	document.getElementById(divID).style.top = topPoint;
}





function placeBGImage() {
// sets the background-image value for the body based on the height of the browser window
// not used in current version, as of yet - may re-institute to put different sized version of bamboo graphic in place
	if (myHeight >= 800) {
		document.getElementById("bodyTag").style.backgroundImage = "url('pageBackground1b.jpg')";
		return;
	}
	if (myHeight < 600) {
		document.getElementById("bodyTag").style.backgroundImage = "url('pageBackground3b.jpg')";
		return;
	}
	document.getElementById("bodyTag").style.backgroundImage = "url('pageBackground2b.jpg')";
}




function positionPastCollectionThumbnails() {
	topY = Math.floor(myHeight / 2) - 155;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("thumbnailsImgDIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}

function positionPastCollectionImages() {
	topY = Math.floor(myHeight / 2) - 170;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplayPastCollDIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}


function positionPhotoRR06() {
	topY = Math.floor(myHeight / 2) - 150;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplayRR2006DIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}

function positionPhotoRR07() {
	topY = Math.floor(myHeight / 2) - 150;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplayRR2007DIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}

function positionPhotoRR09() {
	topY = Math.floor(myHeight / 2) - 150;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplayRR2009DIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}

function positionPhotoOA07() {
	topY = Math.floor(myHeight / 2) - 150;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplayOA2007DIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}

function positionPhotoSW06() {
	topY = Math.floor(myHeight / 2) - 150;
	if (topY < 100) {
		topY = 105; // if by this calculation the top of the DIV would be within the top logo's space, instead place it just below the logo
	}
	topYLinks = topY + 58;
	topY += "px";
	topYLinks += "px";
	document.getElementById("imageDisplaySW2006DIV").style.top = topY;
	// document.getElementById("navLinksDIV").style.top = topYLinks;
}





function showLIGraphic(LItem) {
	LItem.style.backgroundImage = "url('images/general/flower_icon.png')";
}

function hideLIGraphic(LItem) {
	LItem.style.backgroundImage = "none";
}