isIE = (document.all ? true : false);
isDOM = (document.getElementById ? true : false);
function getAbsX(elt) { return (elt.x) ? elt.x : getAbsPos(elt,"Left"); }
function getAbsY(elt) { return (elt.y) ? elt.y : getAbsPos(elt,"Top"); }

function getAbsPos(elt,which) {
iPos = 0;
while (elt != null) {
iPos += elt["offset" + which];
elt = elt.offsetParent;
}
return iPos;
}

function getDivStyle(divname) {
var style;
if (isDOM) { style = document.getElementById(divname).style; }
else { style = isIE ? document.all[divname].style
: document.layers[divname]; }
return style;
}

function hideElement(divname) {
getDivStyle(divname).visibility = 'hidden';
}

function moveBy(elt,deltaX,deltaY) {
elt.left = parseInt(elt.left) + deltaX;
elt.top = parseInt(elt.top) + deltaY;
}

function toggleVisible(divname) {
divstyle = getDivStyle(divname);
if (divstyle.visibility == 'visible' || divstyle.visibility == 'show') {
divstyle.visibility = 'hidden';
} else {
fixPosition(divname);
divstyle.visibility = 'visible';
}
}

function setPosition(elt,positionername,isPlacedUnder) {
var positioner;
if (isIE) {
positioner = document.all[positionername];
} else {
if (isDOM) {
positioner = document.getElementById(positionername);
} else {
positioner = document.images[positionername];
}
}
elt.left = getAbsX(positioner);
elt.top = getAbsY(positioner) + (isPlacedUnder ? positioner.height : 0);
}