prev = 0;

function category_change(id) {

	if(document.getElementById('subcat_'+prev)) document.getElementById('subcat_'+prev).style.display = 'none';
	
	if(document.getElementById('subcat_'+id)) {
		document.getElementById('subcat_'+id).style.display = '';
		prev = id;
	}

}

function redir(url,idtype,id) {
	document.location = url+'&'+idtype+'='+id;
}

prevThumb = 0;

function img(id,url,key) {
	largeUrl = url.replace('.jpg','_prv.jpg');
	document.getElementById('thumb_'+prevThumb).className = 'noactThumb';
	document.getElementById('thumb_'+key).className = 'actThumb';
	document.getElementById(id).src = largeUrl;
	document.getElementById('largeLink').href = url;
	prevThumb = key;
}

function contactForm() {
	if(document.servicecontact.name.value == '') return false;
	if(document.servicecontact.email.value == '') return false;
}