function init(cols, spc) {
	var cnt = getDIV('content');
	var ftr = getDIV('footer');
	var h1 = 0;
	var h2 = 0;
	var h3 = 0;
	var h = 0;
	
    if (cols > 0 && cols <= 3) {
		col1 = getDIV('columnOne');
		h1 = col1.scrollHeight || col1.offsetHeight;
		h2 = 0; h3 = 0;
	} else { return; }
    if (cols > 1 && cols <= 3) {
		col2 = getDIV('columnTwo');
	    h2 = col2.scrollHeight || col2.offsetHeight;
		h3 = 0;
	}
    if (cols == 3) {
		col3 = getDIV('columnThree');
	    h3 = col2.scrollHeight || col2.offsetHeight;
	}

	var y =  cnt.offsetTop + col1.offsetTop;
					
	if (h1 >= h2 && h1 >= h3) { h = y+h1+spc; }
	if (h2 >= h1 && h2 >= h3) { h = y+h2+spc; }
	if (h3 >= h1 && h3 >= h2) { h = y+h3+spc; }

    ftr.style.top = h;
    ftr.style.visibility = 'visible';
}
		
function popUp(u,w,h,o) {
// pops open a popup window, window object popUp(string u url, int w width, int h height, string o options)
// example popUp('popup.html',400,300,'location,scrollbars');

	 if (window.popWin && !popWin.closed) {
	 	if (o != popWinOptions) {
			popWin.close();
			popUp(u,w,h,o);
		} // ensure that the same options apply
		if (popWin.resizeTo) {
			popWin.resizeTo(w,h);
		} else {
			popWin.outerWidth = w;
			popWin.outerHeight = h;
		}
		popWin.location = u;
		popWin.focus();
		return popWin;
	} else {
		if (o) {
			popWin = window.open(u,'pop','width='+w+',height='+h+','+o);
			popWinOptions = o;
		} else {
			popWin = window.open(u,'pop','width='+w+',height='+h);
			popWinOptions = '';
		}
		popWin.opener = window;
		popWin.focus();
		return popWin;
	}
}

function popDown() {
// closes the popup when this window regains focus
// call in the body tag onFocus event
	 if (window.popWin && !popWin.closed) {
		popWin.close();
	}
}