function popup() {
	document.getElementById('form').style.display="block";
	}
	
	
function popwin(url){
	var x= screen.width
	var y= screen.height
	x = x-400;
	y = y-400;
	x = x/2;
	y = y/2;
	
	var win = window.open(url,'','width=335px,height=290px');
	win.moveTo(x,y);
}
	
function closewin(){
	window.close();
	}