var curSlide=0;

function showHideB(i,j) {
	name1 = '#backG'+i;
	name2 = '#backG'+j;
	// window.status = (name1 + ' ' + name2);
	$(name1).fadeOut(1000);
	$(name2).fadeIn(1000);
}
function nextB() {
	if (curSlide+1 < numSlides) {
		nextSlide = curSlide +1;
	}
	else {
		nextSlide = 0;
	}
	showHideB(curSlide,nextSlide);
	curSlide = nextSlide;
	slideTimeout = window.setTimeout('nextB()',10000);
}

$(window).scroll(function() {
	$('#backgroundcontainer').css("height",''+getDocHeight()+'px');
})
$(window).resize(function() {
	$('#backgroundcontainer').css("height",''+getDocHeight()+'px');
})

function getDocHeight() {
    var D = document;
    return Math.max(
        Math.max(D.body.scrollHeight, D.documentElement.scrollHeight),
        Math.max(D.body.offsetHeight, D.documentElement.offsetHeight),
        Math.max(D.body.clientHeight, D.documentElement.clientHeight)
    );
}


function validateform() {
	var formvalidate = true;
	var formarraynames = new Array('null','first_name','last_name','company','email');
	for(var i = 1; i < 5; i++) {
		if(document.getElementById(formarraynames[i]).value=='') { 
			document.getElementById('error'+i).style.display = 'block'; 
			formvalidate = false; 
		} 
		else { 
			document.getElementById('error'+i).style.display = 'none'; 
		}
	}
	if(document.getElementById('country').selectedIndex == 0) {
		document.getElementById('error5').style.display = 'block'; 
		formvalidate = false;
	} 
	else {
		document.getElementById('error5').style.display = 'none'; 
	}
	
	if(formvalidate === true)
	{
		document.getElementById('contactform').submit();
	}
	return false;
}