function getWindowHeight() {
	var myHeight = 0;
	if (typeof(window.innerWidth)=='number') {
		//Non-IE
		myHeight = window.innerHeight;
	} else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
		//IE 6+ in 'standards compliant mode'
		myHeight = document.documentElement.clientHeight;
	} else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {
		//IE 4 compatible
		myHeight = document.body.clientHeight;
	}
	document.getElementById('transparant').height = myHeight;
}