// JavaScript Document

function centerwindow(theurl,wname,width,height,options) {
    x = (640 - width)/2, y = (480 - height)/2;

    if (screen) {
        y = (screen.availHeight - height)/2;
        x = (screen.availWidth - width)/2;
    }
        if (screen.availWidth > 1800) { 
        x = ((screen.availWidth/2) - width)/2; 
    } 

	theurl = theurl + location.search ;

	if (options != ""){
		options = "," + options ;
	}
	openWin = window.open(theurl, wname, 'width='+width+',height='+height+',screenX='+x+',screenY='+y+',top='+y+',left='+x + options); 
}