function ShowPopUp(url,width,height,resize,bars){
	var oWin;
	var params = "toolbar=0,menubar=0,resizable="+resize+",scrollbars="+bars;
	
	if (width){params = params + ",width=" + width}
	if (height){params = params + ",height=" + height}
	params = params + ",top=" + Math.floor((screen.height-height)/2) + ",left=" + Math.floor((screen.width-width)/2);

	oWin = window.open(url,"PopUp",params);
	return oWin;
}