if (document.images) {
homeoff=new Image();
homeoff.src= "../images/sidenav/homeoff.gif";
homeon=new Image();
homeon.src= "../images/sidenav/homeon.gif";
companyoff=new Image();
companyoff.src= "../images/sidenav/companyoff.gif";
companyon=new Image();
companyon.src= "../images/sidenav/companyon.gif";
servicesoff=new Image();
servicesoff.src= "../images/sidenav/clientservicesoff.gif";
serviceson=new Image();
serviceson.src= "../images/sidenav/clientserviceson.gif";
propertiesoff=new Image();
propertiesoff.src= "../images/sidenav/propertiesoff.gif";
propertieson=new Image();
propertieson.src= "../images/sidenav/propertieson.gif";
historyoff=new Image();
historyoff.src= "../images/sidenav/historyoff.gif";
historyon=new Image();
historyon.src= "../images/sidenav/historyon.gif";
homesearchoff=new Image();
homesearchoff.src= "../images/sidenav/homesearchoff.gif";
homesearchon=new Image();
homesearchon.src= "../images/sidenav/homesearchon.gif";
developeroff=new Image();
developeroff.src= "../images/sidenav/devservicesoff.gif";
developeron=new Image();
developeron.src= "../images/sidenav/devserviceson.gif";
pastprojectsoff=new Image();
pastprojectsoff.src= "../images/sidenav/pastprojectsoff.gif";
pastprojectson=new Image();
pastprojectson.src= "../images/sidenav/pastprojectson.gif";
contactoff=new Image();
contactoff.src= "../images/sidenav/contactoff.gif";
contacton=new Image();
contacton.src= "../images/sidenav/contacton.gif";
agentsoff=new Image();
agentsoff.src= "../images/sidenav/agentsoff.gif";
agentson=new Image();
agentson.src= "../images/sidenav/agentson.gif";
}


function imageOn (imagename){
  document[imagename].src=eval(imagename+"on.src");
 }
function imageOff (imagename){
  document[imagename].src=eval(imagename+"off.src");
 }