// JavaScript Document
//-------------------------------------------------------------------------------------------------------------------------------------------------------------------

function getWindowHeight() {
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number') {
		windowHeight = window.innerHeight;
	}
	else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight = document.documentElement.clientHeight;
		}
		else {
			if (document.body && document.body.clientHeight) {
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}

//-------------------------------------------------------------------------------------------------------------------------------------------------------------------

function repositionFrame(){
	frameRef = document.getElementById('frame');
	
	frameHeight = frameRef.offsetHeight;
	windowHeight = getWindowHeight();
	frameNewTop = (windowHeight - frameHeight)/2;
	
	if (frameNewTop >=0){
		frameRef.style.top = frameNewTop + 'px'
	}
}

//-------------------------------------------------------------------------------------------------------------------------------------------------------------------

window.onload=repositionFrame;
window.onresize=repositionFrame;