var app = Sys.Application;

app.add_init(ApplicationInit);

function ApplicationInit(sender) {
    var prm = Sys.WebForms.PageRequestManager.getInstance();
    if (!prm.get_isInAsyncPostBack()) {
        if (typeof contentPageLoad == "function") {
            prm.add_pageLoaded(contentPageLoad);
        }
        if (typeof onPageLoad == "function") {
            prm.add_pageLoaded(onPageLoad);
        }
        if (typeof onEndRequest == "function") {
            prm.add_endRequest(onEndRequest);
        }
    }
}

function openAWindow2( pageToLoad, winName, width, height, center){

xposition=0; yposition=0;
if ((parseInt(navigator.appVersion) >= 4 ) &&(center)){
 xposition = (screen.width - width) / 8;
 yposition = (screen.height - height) / 3;
}

args = "width=" + width + ","
+ "height=" + height + ","
+ "location=0,"
+ "menubar=0,"
+ "resizable=0,"
+ "scrollbars=1,"
+ "status=0,"
+ "titlebar=0,"
+ "toolbar=0,"
+ "hotkeys=0,"
+ "screenx=" + xposition + "," //NN Only
+ "screeny=" + yposition + "," //NN Only
+ "left=" + xposition + "," //IE Only
+ "top=" + yposition; //IE Only

window.open( pageToLoad, winName, args );

}