// global variable
var infowin='';
var onof = ["no", "yes"]; // 00000 represent "toolbar|resizable|scrollbars|menubar|status"

function popUpWin (url, attr, W, H, L, T) {
	
	var WIDTH = W || 600;
	var HEIGHT = H || 400;
	var LEFT = L || ((screen.width-WIDTH)/2);
	var TOP = T || ((screen.height-HEIGHT)/2);
	
	var WINFEATURE = "toolbar=" + onof[attr.charAt(0)] + ",resizable=" + onof[attr.charAt(1)] + ",scrollbars=" + onof[attr.charAt(2)] + ",menubar=" + onof[attr.charAt(3)] + ",status=" + onof[attr.charAt(4)] + ",left=" + LEFT + ",top=" + TOP;

	if (!infowin)
		infowin = window.open(url, "infowin", "width=" + WIDTH + ",height=" + HEIGHT + ',' + WINFEATURE);
	else {
		if (!infowin.closed){
			infowin.close();
		}
		infowin = window.open(url, "infowin", "width=" + WIDTH + ",height=" + HEIGHT + ',' + WINFEATURE);
	}
}