var cached=0;

if (document.images){

the_enquiries_off = new Image()
the_enquiries_off.src = "navbar/enquiries.gif"
the_enquiries_on = new Image()
the_enquiries_on.src = "navbar/enquiries_on.gif"

the_notebooks_off = new Image()
the_notebooks_off.src = "navbar/notebooks.gif"
the_notebooks_on = new Image()
the_notebooks_on.src = "navbar/notebooks_on.gif"

the_project_off = new Image()
the_project_off.src = "navbar/project.gif"
the_project_on = new Image()
the_project_on.src = "navbar/project_on.gif"

the_publication_off = new Image()
the_publication_off.src = "navbar/publication.gif"
the_publication_on = new Image()
the_publication_on.src = "navbar/publication_on.gif"

the_pushkin_off = new Image()
the_pushkin_off.src = "navbar/pushkin.gif"
the_pushkin_on = new Image()
the_pushkin_on.src = "navbar/pushkin_on.gif"

cached=1;
}

function imageOn(imgName) {
	if (cached==1) {
	lineOn = eval("the_" + imgName + "_on.src");
	document [imgName].src= lineOn;
	}
}

function imageOff(imgName) {
	if (cached==1) {
	lineOff = eval("the_" + imgName + "_off.src");
	document [imgName].src= lineOff;
	}
}