function popup(x) {
	var width = '450';
	var height = '200';
	var left = (screen.width - width) / 2;
    var top = (screen.height - height) / 2;
	var clusters = window.open('clusters.html#'+x,
	                           'clusters',
	            	           'height='+height+',width='+width+',resizable=0,toolbar=0,left='+left+',top='+top);
	clusters.focus();
}
function toggleWDW(a) {
	if(a != 1) {} else {
		var Obj = document.getElementById('toggle-wdw');
		if(Obj.className == 'close') {
			Obj.className = '';
		} else {
			Obj.className = 'close';
		}
		
		$('toggle-wdw-content').toggle();
	}
}