var tab1_on = true;
var tab2_on = false;
var tab3_on = false;
var tab1img_on = '/endo/images/homebox-tab-registration-on.gif';
var tab1img_over = '/endo/images/homebox-tab-registration-over.gif';
var tab1img_off = '/endo/images/homebox-tab-registration-off.gif';
var tab2img_on = '/endo/images/homebox-tab-housing-on.gif';
var tab2img_over = '/endo/images/homebox-tab-housing-over.gif';
var tab2img_off = '/endo/images/homebox-tab-housing-off.gif';
var tab3img_on = '/endo/images/homebox-tab-travel-on.gif';
var tab3img_over = '/endo/images/homebox-tab-travel-over.gif';
var tab3img_off = '/endo/images/homebox-tab-travel-off.gif';

// preload images
var loadtab1on = new Image();
loadtab1on.src = tab1img_on;
var loadtab1over = new Image();
loadtab1over.src = tab1img_over;
var loadtab1off = new Image();
loadtab1off.src = tab1img_off;
var loadtab2on = new Image();
loadtab2on.src = tab2img_on;
var loadtab2over = new Image();
loadtab2over.src = tab2img_over;
var loadtab2off = new Image();
loadtab2off.src = tab2img_off;
var loadtab3on = new Image();
loadtab3on = tab3img_on;
var loadtab3over = new Image();
loadtab3over.src = tab3img_over;
var loadtab3off = new Image();
loadtab3off.src = tab3img_off;

function TabRollOver(tab) {
	if (tab == "tab1" && !tab1_on) document.tab1.src = tab1img_over;
	else if (tab == "tab2" && !tab2_on) document.tab2.src = tab2img_over;
	else if (tab == "tab3" && !tab3_on) document.tab3.src = tab3img_over;
}
function TabRollOut(tab) {
	if (tab == "tab1" && tab1_on) document.tab1.src = tab1img_on;
	else if (tab == "tab1" && !tab1_on) document.tab1.src = tab1img_off;
	else if (tab == "tab2" && tab2_on) document.tab2.src = tab2img_on;
	else if (tab == "tab2" && !tab2_on) document.tab2.src = tab2img_off;
	else if (tab == "tab3" && tab3_on) document.tab3.src = tab3img_on;
	else if (tab == "tab3" && !tab3_on) document.tab3.src = tab3img_off;
}
function ShowTab(tab,divName1,divName2,divName3) {
	ShowContent(divName1);
	HideContent(divName2);
	HideContent(divName3);
	if (tab == "tab1") { 
		document.tab1.src=tab1img_on; 
		document.tab2.src=tab2img_off;
		document.tab3.src=tab3img_off;
		tab1_on = true;
		tab2_on = false;
		tab3_on = false;
	}
	else if (tab == "tab2") { 
		document.tab2.src=tab2img_on; 
		document.tab1.src=tab1img_off;
		document.tab3.src=tab3img_off;
		tab2_on = true; 
		tab1_on = false;
		tab3_on = false;
	}
	else if (tab == "tab3") { 
		document.tab3.src=tab3img_on; 
		document.tab1.src=tab1img_off;
		document.tab2.src=tab2img_off;
		tab3_on = true; 
		tab1_on = false;
		tab2_on = false;
	}
}
function HideContent(d) {
	document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
	document.getElementById(d).style.display = "block";
}
function ReverseContentDisplay(d) {
	if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; }
	else { document.getElementById(d).style.display = "none"; }
}
function ChangeImgSrc(imgName,newSrc) {
	document.imgName.src=newSrc;
}