/*
-------------------------
images rollover functions
-------------------------
*/

function show(object) {
    if (document.getElementById && document.getElementById(object) != null)
         node = document.getElementById(object).style.visibility='visible';
    else if (document.layers && document.layers[object] != null)
        document.layers[object].visibility = 'visible';
    else if (document.all)
        document.all[object].style.visibility = 'visible';
}

function hide(object) {
    if (document.getElementById && document.getElementById(object) != null)
         node = document.getElementById(object).style.visibility='hidden';
    else if (document.layers && document.layers[object] != null)
        document.layers[object].visibility = 'hidden';
    else if (document.all)
         document.all[object].style.visibility = 'hidden';
}
	
function preload(imgObj,imgSrc) 
{
	if (document.images) {
		eval(imgObj+' = new Image()')
		eval(imgObj+'.src = "'+imgSrc+'"')
	}
}

function changeImage(layer,imgName,imgObj) {
	if (document.images) 
	{
	if (document.layers && layer!=null) eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src')
	else document.images[imgName].src = eval(imgObj+".src")
	}
}



/*
---------------------
Sciart menu functions
---------------------
*/

function sciart_menu(section_name)
	{
	hide('aboutbutton2');
	hide('essaysbutton2');
	hide('newsbutton2');
	hide('projectsbutton2');
	hide('linksbutton2');
	
	show('aboutbutton');
	show('essaysbutton');
	show('newsbutton');
	show('projectsbutton');
	show('linksbutton');
	
	hide(section_name+'button');
	show(section_name+'button2');

	hide('aboutbar');
	hide('essaysbar');
	hide('newsbar');
	hide('projectsbar');
	hide('projectsbar2');
	hide('linksbar');
	hide('bar2002');
	hide('previouslink');
	hide('link2002');
	hide('previouslink2');
	hide('link22002');
	hide('contactlink');
	hide('mllink');
	hide('winnerslink');
	hide('runnersuplink');
	
	if (section_name=='projects') 
		{
		show('link2002');
		show('previouslink');
		}
		
	if (section_name=='about') 
		{
		show('contactlink');
		show('mllink');
		}
			
	show(section_name+'bar');
	}
	
function show_bar2002()
	{
	hide('projectsbar');
	hide('link2002');
	hide('previouslink');
	
	show('projectsbar2');
	show('bar2002')
	show('winnerslink')
	show('runnersuplink');
	show('previouslink2');
	show('link22002');
	}
	
	
/*
--------------------------
image function for winners
--------------------------
*/

function writecredit(title, artists, artists2)
	{
	title='<span class="subheadingprojects">'+title+'</span>';
	artists='<span class="subheadingprojects">'+artists+'</span>';
	artists2='<span class="subheadingprojects">'+artists2+'</span>';
	writediv('imagetitle', title);
	writediv('imageartists', artists);
	writediv('imageartists2', artists2);
	}

function emptycredit()
	{
	writediv('imagetitle', '');
	writediv('imageartists', '');
	writediv('imageartists2', '');
	}
	
function writediv(div, chaine) 
	{
	if (ns) 
		{
		document.layers[div].document.open();
		document.layers[div].document.write(chaine);
		document.layers[div].document.close();
		}
	else if (ie) document.all[div].innerHTML = chaine;
	}


	
/*---------------------------------
Submit a form on a layer functions
---------------------------------*/	
function submitform()
	{
	if (ns4) document.layers['formtable'].document.frm.submit();
	else if (ie4) document.frm.submit();
	}