// JavaScript Document
function preview(img){
	window.open("preview.aspx?img=" + img,"preview","srollbars=yes,width=350,height=300,top=150,left=150");
}
function centerwindow(){

	var width = document.body.offsetWidth;
	var height = document.body.offsetHeight;
	var swidth = screen.width;
	var sheight = screen.height;
	var newtop = (sheight - height) / 2; 
	var newleft = (swidth - width) / 2;
	
	self.moveTo(newleft,newtop);
	
}