function toggle(div_id) {
	var el = document.getElementById(div_id);
	if ( el.style.display == 'none' ) {	el.style.display = 'block';}
	else {el.style.display = 'none';}
}
function bgdivpopup_size(divpopupVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportheight = window.innerHeight;
	} else {
		viewportheight = document.documentElement.clientHeight;
	}
	if ((viewportheight > document.body.parentNode.scrollHeight) && (viewportheight > document.body.parentNode.clientHeight)) {
		bgdivpopup_height = viewportheight;
	} else {
		if (document.body.parentNode.clientHeight > document.body.parentNode.scrollHeight) {
			bgdivpopup_height = document.body.parentNode.clientHeight;
		} else {
			bgdivpopup_height = document.body.parentNode.scrollHeight;
		}
	}
	var bgdivpopup = document.getElementById('bgdivpopup');
	bgdivpopup.style.height = bgdivpopup_height + 'px';
	var divpopup = document.getElementById(divpopupVar);
	divpopup_height=bgdivpopup_height/2-380;
	divpopup.style.top = divpopup_height + 'px';
}
function window_pos(divpopupVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerHeight;
	} else {
		viewportwidth = document.documentElement.clientHeight;
	}
	if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
		window_width = viewportwidth;
	} else {
		if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
			window_width = document.body.parentNode.clientWidth;
		} else {
			window_width = document.body.parentNode.scrollWidth;
		}
	}
	var divpopup = document.getElementById(divpopupVar);
	window_width=window_width/2-320;
	divpopup.style.left = window_width + 'px';
}
function popup(windowname) {
	bgdivpopup_size(windowname);
	window_pos(windowname);
	toggle('bgdivpopup');
	toggle(windowname);		
}