function float_window_fos () {
cWidth=document.body.clientWidth;
cHeight=document.body.clientHeight;
sTop=document.body.scrollTop;
with(document.getElementById('fos'))
	{width=595;
	 height=530;
	 style.visibility='visible';
	 style.left=(cWidth-width)/2;
	 style.top=((cHeight-height)/2)+sTop;
	}
}

function feedback_form () {
cWidth=document.body.clientWidth;
cHeight=document.body.clientHeight;
sTop=document.body.scrollTop;
with(document.getElementById('feedback'))
	{width=450;
	 height=440;
	 style.visibility='visible';
	 style.left=(cWidth-width)/2;
	 style.top=((cHeight-height)/2)+sTop;
	}
}

function float_window_question () {
cWidth=document.body.clientWidth;
cHeight=document.body.clientHeight;
sTop=document.body.scrollTop;
scrolledDown = document.body.parentNode.scrollTop;
with(document.getElementById('question'))
	{width=650;
	 height=580;
	 style.visibility='visible';
	 style.left=(cWidth-450)/2;
	 style.top=((cHeight-270)/2)+sTop;
	 //style.left=(cWidth+180)/2;
	 //style.top=scrolledDown+150+'px';
	}
}