//declare variable here
var	win = null;
function NewWindow(mypage,myname,w,h,scroll){
				 var LeftPosition = (screen.availWidth)?(screen.availWidth-w) /2:50;
				 var TopPosition = (screen.availHeight)?(screen.availHeight-h) /2:50;
				 var settings = ('width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll);
				 win = window.open(mypage,myname,settings);
				 win.focus();
				 
				 
}