function imgHighlight(imgName) {
	document.getElementById(imgName).src = '/gfx/nav/' + imgName + '_o.gif'
}

function imgUnHighlight(imgName) {
	document.getElementById(imgName).src = '/gfx/nav/' + imgName + '.gif'
}

function resizeBG() {
	if ((document.getElementById('MainBody').offsetHeight) < 540) {
		document.getElementById('mainContainer').style.height = '710px'
	} else {
		document.getElementById('mainContainer').style.height = document.getElementById('MainBody').offsetHeight + 190 + 'px'
	}
}

function toggleVis(elementId) {
	divHeight = document.getElementById(elementId).offsetHeight
	if (divHeight == 0) {
		document.getElementById(elementId).style.display = 'block'
		resizeBG()
	} else {
		document.getElementById(elementId).style.display = 'none'
		resizeBG()
	}
}

function toggleDetailImg(imgId) {
	detailSrc = document.getElementById(imgId).src.split('_')
	detailSrc = detailSrc.pop()
	if (detailSrc == 'horiz.gif') {
		document.getElementById(imgId).src = '/gfx/detail_vert.gif'
	} else {
		document.getElementById(imgId).src = '/gfx/detail_horiz.gif'
	}
}