/*
Please see http://www.howtocreate.co.uk/jslibs/ for details and a demo of this script
Please see http://www.howtocreate.co.uk/jslibs/termsOfUse.html for terms of use
*/

var openLists = [], oIcount = 0;
function compactMenu(oID,oAutoCol,oPlMn,oMinimalLink) {
if( !document.getElementsByTagName || !document.childNodes || !document.createElement ) { return; }
var baseElement = document.getElementById( oID ); if( !baseElement ) { return; }
compactChildren( baseElement, 0, oID, oAutoCol, oPlMn, baseElement.tagName.toUpperCase(), oMinimalLink && oPlMn );
}
function compactChildren( oOb, oLev, oBsID, oCol, oPM, oT, oML ) {
if( !oLev ) { oBsID = escape(oBsID); if( oCol ) { openLists[oBsID] = []; } }
for( var x = 0, y = oOb.childNodes; x < y.length; x++ ) { if( y[x].tagName ) {
//for each immediate LI child
var theNextUL = y[x].getElementsByTagName( oT )[0];
if( theNextUL ) {
//collapse the first UL/OL child
theNextUL.style.display = 'none';
//create a link for expanding/collapsing
var newLink = document.createElement('A');
newLink.setAttribute( 'href', '#' );
newLink.onclick = new Function( 'clickSmack(this,' + oLev + ',\'' + oBsID + '\',' + oCol + ',\'' + escape(oT) + '\');return false;' );
//wrap everything upto the child U/OL in the link
if( oML ) { var theHTML = ''; } else {
var theT = y[x].innerHTML.toUpperCase().indexOf('<'+oT);
var theA = y[x].innerHTML.toUpperCase().indexOf('<A');
var theHTML = y[x].innerHTML.substr(0, ( theA + 1 && theA < theT ) ? theA : theT );
while( !y[x].childNodes[0].tagName || ( y[x].childNodes[0].tagName.toUpperCase() != oT && y[x].childNodes[0].tagName.toUpperCase() != 'A' ) ) {
y[x].removeChild( y[x].childNodes[0] ); }
}
y[x].insertBefore(newLink,y[x].childNodes[0]);
y[x].childNodes[0].innerHTML = oPM + theHTML.replace(/^\s*|\s*$/g,'');
theNextUL.MWJuniqueID = oIcount++;
compactChildren( theNextUL, oLev + 1, oBsID, oCol, oPM, oT, oML );
} } } }
function clickSmack( oThisOb, oLevel, oBsID, oCol, oT ) {
if( oThisOb.blur ) { oThisOb.blur(); }
oThisOb = oThisOb.parentNode.getElementsByTagName( unescape(oT) )[0];
if( oCol ) {
for( var x = openLists[oBsID].length - 1; x >= oLevel; x-=1 ) { if( openLists[oBsID][x] ) {
openLists[oBsID][x].style.display = 'none'; if( oLevel != x ) { openLists[oBsID][x] = null; }
} }
if( oThisOb == openLists[oBsID][oLevel] ) { openLists[oBsID][oLevel] = null; }
else { oThisOb.style.display = 'block'; openLists[oBsID][oLevel] = oThisOb; }
} else { oThisOb.style.display = ( oThisOb.style.display == 'block' ) ? 'none' : 'block'; }
}
function stateToFromStr(oID,oFStr) {
if( !document.getElementsByTagName || !document.childNodes || !document.createElement ) { return ''; }
var baseElement = document.getElementById( oID ); if( !baseElement ) { return ''; }
if( !oFStr && typeof(oFStr) != 'undefined' ) { return ''; } if( oFStr ) { oFStr = oFStr.split(':'); }
for( var oStr = '', l = baseElement.getElementsByTagName(baseElement.tagName), x = 0; l[x]; x++ ) {
if( oFStr && MWJisInTheArray( l[x].MWJuniqueID, oFStr ) && l[x].style.display == 'none' ) { l[x].parentNode.getElementsByTagName('a')[0].onclick(); }
else if( l[x].style.display != 'none' ) { oStr += (oStr?':':'') + l[x].MWJuniqueID; }
}
return oStr;
}
function MWJisInTheArray(oNeed,oHay) { for( var i = 0; i < oHay.length; i++ ) { if( oNeed == oHay[i] ) { return true; } } return false; }
function selfLink(oRootElement,oClass,oExpand,oLink) {
var tmpLink;
if(!document.getElementsByTagName||!document.childNodes) { return; }
oRootElement = document.getElementById(oRootElement);
if( oLink ) {
tmpLink = document.createElement('a');
tmpLink.setAttribute('href',oLink);
}
for( var x = 0, y = oRootElement.getElementsByTagName('a'); y[x]; x++ ) {
if( y[x].getAttribute('href') && !y[x].href.match(/#$/) && getRealAddress(y[x]) == getRealAddress(oLink?tmpLink:location) ) {
y[x].className = (y[x].className?(y[x].className+' '):'') + oClass;
if( oExpand ) {
oExpand = false;
for( var oEl = y[x].parentNode, ulStr = ''; oEl != oRootElement && oEl != document.body; oEl = oEl.parentNode ) {
if( oEl.tagName && oEl.tagName == oRootElement.tagName ) { ulStr = oEl.MWJuniqueID + (ulStr?(':'+ulStr):''); } }
stateToFromStr(oRootElement.id,ulStr);
} } } }
function getRealAddress(oOb) { return oOb.protocol + ( ( oOb.protocol.indexOf( ':' ) + 1 ) ? '' : ':' ) + oOb.hostname + ( ( typeof(oOb.pathname) == typeof(' ') && oOb.pathname.indexOf('/') != 0 ) ? '/' : '' ) + oOb.pathname + oOb.search; }
function expandCollapseAll(oElID,oState) {
if(!document.getElementsByTagName||!document.childNodes) { return; }
var oEl = document.getElementById(oElID);
var oT = oEl.tagName;
var oULs = oEl.getElementsByTagName(oT);
for( var i = 0, oLnk; i < oULs.length; i++ ) {
if( typeof(oULs[i].MWJuniqueID) != 'undefined' ) {
oLnk = oULs[i].parentNode.getElementsByTagName( 'a' )[0];
if( oLnk && ( ( oState && oULs[i].style.display == 'none' ) || ( !oState && oULs[i].style.display != 'none' ) ) ) {
oLnk.onclick();
} } } }
window.onload = function () { compactMenu('nav_categories',false,'<img src="/images/nav-arrow.gif" onclick="toggleImage(this)" style="border:none;" />&nbsp;'); }
function toggleImage(obj) {
   if (obj.src == "http://www.vetinfo.com/images/nav-arrow.gif") {
      obj.src = "http://www.vetinfo.com/images/nav-arrow2.gif";
   } else {
      obj.src = "http://www.vetinfo.com/images/nav-arrow.gif";
   }
}