// JavaScript Document

var _DOMAIN = 'www.sistersofmercy.ie';

function initRollovers() {
   var all_links;
   var link;
   var idx;
	var tmp_image;
	var section_id = getSectionId();	

   if (!document.getElementsByTagName) {
      return;   
   }
   
   all_links = document.getElementsByTagName("a");
   
   for (idx = 0; idx < all_links.length; idx++) {
      link = all_links[idx];
	  
		if (link.className && (' ' + link.className + ' ').indexOf(' rollover ') != -1) {
		  if (link.childNodes && link.childNodes.length == 1 && (link.childNodes[0].nodeName.toLowerCase() == 'img' || link.childNodes[0].nodeName.toLowerCase() == 'input')) {
			  
			// Pre-load state 2 images
			tmp_image = new Image();
			tmp_image.src = link.childNodes[0].src.replace(/(\.[^.]+)$/, "_f1$1");
			
			if (link.childNodes[0].id && link.childNodes[0].id == section_id) {
				// Don't attach a listener. Instead, set rollover state permanently
				link.childNodes[0].src = link.childNodes[0].src.replace(/(\.[^.]+)$/, "_f1$1");
			} else {								
				link.onmouseover = mouseover;
				link.onmouseout = mouseout;
				link.onfocus = mouseover;
				link.onblur = mouseout;
			}
		 }
		}	
   }
}

function findTarget(e) {
	var target;
	
	if (window.event && window.event.srcElement) {
		target = window.event.srcElement;
	}
	else if (e && e.target) {
		target = e.target;	   
	}
	
	if (!target) return null;
	
	while (target != document.body && target.nodeName.toLowerCase() != "a") {
		target = target.parentNode;   
	}
	
	if (target.nodeName.toLowerCase() != "a") return null;
	
	return target;
}

function mouseover(e) {
	var target = findTarget(e);
	var img_tag;
	
	if (!target) return;
	
	img_tag = target.childNodes[0];
	
	if (img_tag.src.indexOf("_f1.") < 0) img_tag.src = img_tag.src.replace(/(\.[^.]+)$/, "_f1$1"); 
}

function mouseout(e) {
	var target = findTarget(e);
	var img_tag;
	
	if (!target) return;
	
	img_tag = target.childNodes[0];
	img_tag.src = img_tag.src.replace(/_f1(\.[^.]+)$/, "$1");   
}

function getSectionId() {
	var current_url = location.href;
	var pattern = new RegExp("^http:\\/\\/" + _DOMAIN + "\\/(\\w+)");
	var regexp_results = pattern.exec(current_url);
	
	if (RegExp.$1) {
		return RegExp.$1;
	} else {
		return '';
	}
}

function displayShortcut() {
	var cntlSelect = document.getElementById("slcShortcuts");
	
	if (cntlSelect) {
		this.location = cntlSelect.options[cntlSelect.selectedIndex].value;	
	}
}

function initPage() {
	initRollovers();
}

window.onload = initPage;