/* javascript-functies show/hide tooltips */
/* (c)2008 arthur van zuylen, www.2parts.nl */

addEvent(window,'load',prepareTooltips);

function prepareTooltips() {
	
	if(	!document.getElementById('legenda')) {
		return;
	}
	
	var legenda = document.getElementById('legenda');
	
	if (document.getElementsByTagName) {
		var links = legenda.getElementsByTagName('a');
		var link;
		
		for (var i=0; i<links.length; i++) {
			
			link = links[i];
			
			if (link.className == 'tooltip') { 
				
				link.onclick = function() {
									
					// verander style van bijbehorende span
					var display = document.getElementById(this.rel).style.display;
					
					if(display == '' || display == 'none') {
						document.getElementById(this.rel).style.display = 'block';
					} else {
						document.getElementById(this.rel).style.display = 'none';
					}	
				}
				
				link.onmouseout = function() {
					
					document.getElementById(this.rel).style.display = 'none';
					
				}
			}
		}
	}
}