// Main JavaScript Document for UKBTS ASP site
// Author:   Roy Grainger
// Copyright: Roy Grainger
/***********************************************/
/* Text Size Buttons                           */
/***********************************************/
<!-- Increase and Decrease Text-->	
var max = 130 
var min = 70 
function increaseSizeLoop() { 
size = parseInt(document.getElementById("article").style.fontSize) 
if (size != max) { 
size = size + 20 
} 
else { 
size = 70
} 
document.getElementById("article").style.fontSize = size + "%" 
} 

function increaseSize() { 
size = parseInt(document.getElementById("article").style.fontSize) 
if (size != max) { 
size = size + 20 
} 
document.getElementById("article").style.fontSize = size + "%" 
}


function decreaseSize() { 
size = parseInt(document.getElementById("article").style.fontSize) 
if (size != min) { 
size = size - 20 
} 
document.getElementById("article").style.fontSize = size + "%" 
} 

/***********************************************/
/* Buttons - Rollovers Common to all pages     */
/***********************************************/
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlagHeader == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlagHeader = false;
function preloadImagesHeader() {
	if (document.images) {		
		TextPlusBtn_over = newImage("i/h/TextPlusBtn-over.gif");
		TextPlusBtn_down = newImage("i/h/TextPlusBtn-down.gif");
		TextMinusBtn_over = newImage("i/h/TextMinusBtn-over.gif");
		TextMinusBtn_down = newImage("i/h/TextMinusBtn-down.gif");
		
		contact_us_over = newImage("i/h/contact-us-over.gif");
		contact_us_down = newImage("i/h/contact-us-down.gif");
		
		home_over = newImage("i/h/home-over.gif");
		home_down = newImage("i/h/home-down.gif");
		
		about_us_over = newImage("i/h/about-us-over.gif");
		about_us_down = newImage("i/h/about-us-down.gif");
		
		help_us_over = newImage("i/h/help-us-over.gif");
		help_us_down = newImage("i/h/help-us-down.gif");
		
		support_over = newImage("i/h/support-over.gif");
		support_down = newImage("i/h/support-down.gif");
				
		research_over = newImage("i/h/research-over.gif");
		research_down = newImage("i/h/research-down.gif");
		
		library_over = newImage("i/h/library-over.gif");
		library_down = newImage("i/h/library-down.gif");
		
		newsevents_over = newImage("i/h/newsevents-over.gif");
		newsevents_down = newImage("i/h/newsevents-down.gif");
		
		
		forums_over = newImage("i/h/forums-over.gif");
		forums_down = newImage("i/h/forums-down.gif");
		
		preloadFlagHeader = true;
	}
}

//===============================================================================
//Disable right click script 

var message="";
///////////////////////////////////
function clickIE() {if (document.all) {(message);return false;}}
function clickNS(e) {if 
(document.layers||(document.getElementById&&!document.all)) {
if (e.which==2||e.which==3) {(message);return false;}}}
if (document.layers) 
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}

document.oncontextmenu=new Function("return false")
//================================================================================