function cWindow(windowUrl,w_width,w_height) {
	var window_width = w_width;
	var window_height = w_height;
	var winleft = (screen.availWidth - window_width) / 2;
	var wintop = (screen.availHeight - window_height) / 2;
	params = ('toolbar=0,scrollbars=0,menubar=0,location=0,resizable=0,directories=0,status=0, width='+ window_width +',height='+ window_height +',left='+ winleft +',top='+ wintop);
	F1=window.open(windowUrl,'name',params);
}

function openit(url, width, height, params){
window.open (url, "", params + ", width=" + width + ", height="+ height);
}