/* image rollovers */

	buttons = new Array('about','about_developer','about_benefits','about_process','services','services_design','services_programming','services_consultation','services_hosting','portfolio','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_fullsite','portfolio_subcontract','contact','contact_','home','home_');
	buttonOff = new Array();
	buttonOn = new Array();

for(var i=0; i <= buttons.length-1; i++) {
	buttonOff[buttons[i]] = document.createElement("img");
	buttonOff[buttons[i]].src = "images/but_" + buttons[i] + ".gif";

	buttonOn[buttons[i]] = document.createElement("img");
	buttonOn[buttons[i]].src = "images/but_" + buttons[i] + "_.gif";
}

// functions to do the image swapping
function swapOn(image) {
		document[image].src = buttonOn[image].src;
}

function swapOff(image) {
		document[image].src = buttonOff[image].src;
}

// initialise buttons
function initButtons(currentSection,currentSubSection) {
 	if (document.images[currentSection]) {
		swapOn(currentSection);
		// rewrite the 'Off' state button to the 'On' version
		buttonOff[currentSection].src = buttonOn[currentSection].src
	}

	if (document.images[currentSubSection])	{
		swapOn(currentSubSection);
		// rewrite the 'Off' state button to the 'On' version
		buttonOff[currentSubSection].src = buttonOn[currentSubSection].src
	}
}

/* screen shot popup */

function showScreen(image) {
	window.open('show_screen.htm?image=' + image,'screenShots','width=700,height=500');
}