function NewWindow(url,nombre,w,h,scroll){
var win = null;
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
caracteristicas = 'height='+h+',width='+w+',top='+TopPosition+',left ='+LeftPosition+',scrollbars=1'+scroll+',resizable '
win = window.open(url,nombre,caracteristicas)
}
<a href="archivo.asp?id="&tu_parametro&" onClick="NewWindow(this.href,'name','590','500','y es');return false">