var jpg = 7;
var gif = 5;
var f = false;
var b = new Array;
var c = new Array;

function prel(){
	for(i=1;i<=jpg;i++)
	{
		str = 'buttons/b' + i + '_o.jpg';
		b[i-1] = new Image();
		b[i-1].src = str;
	}
	for(i=1;i<=gif;i++)
	{
		str = 'buttons/b' + i + '_o.gif';
		c[i-1] = new Image();
		c[i-1].src = str;
	}
}

function on(im){document.images[im].src="buttons/"+im+"_o.jpg";}

function off(im){document.images[im].src = "buttons/"+im+".jpg";}

function on_gif(im){document.images[im].src="buttons/"+im+"_o.gif";}

function off_gif(im){document.images[im].src = "buttons/"+im+".gif";}

/********** Show block **********/
function show(id) {
	if (document.getElementById(id).style.display == 'block')
		{document.getElementById(id).style.display = 'none'}
	else
		{document.getElementById(id).style.display = 'block'}
}

function hide(id) {
	if (document.getElementById(id).style.visibility == 'hidden')
		{document.getElementById(id).style.visibility = 'visible'}
	else
		{document.getElementById(id).style.visibility = 'hidden'}
}

/********** min width ************/
var d = document;
var winIE = (navigator.userAgent.indexOf("Opera")==-1 && (d.getElementById && d.documentElement.behaviorUrns)) ? true : false;
function bodySize()
{
	if(winIE && d.documentElement.clientWidth) 
	{
		sObj = d.getElementsByTagName("body")[0].style;
		sObj.width = (d.documentElement.clientWidth<1000) ? "1000px" : "auto";
		
	}
 }

 function init()
 {
	if(winIE) { bodySize(); }
 }
 onload = init;
 if(winIE) { onresize = bodySize; }