// JavaScript Document

function CentreWindow(){
	//alert(GetWidth() + ":" + GetHeight());
	var Npv_Width = 900;
	var Npv_Height = 520;
	
	if (GetHeight() < Npv_Height){
		Npv_Height = GetHeight() - 20;
	}
	
	document.getElementById("BodyBlock").style.left =  (GetWidth() - Npv_Width) / 2 + "px";
	document.getElementById("BodyBlock").style.top =  (GetHeight() - Npv_Height) / 2 + "px";
	document.getElementById("BodyBlock").style.visibility = "visible";
}

function GetWidth(){
        var x = 0;
        if (self.innerWidth){
                x = self.innerWidth;
        }else if (document.documentElement && document.documentElement.clientHeight){
                x = document.documentElement.clientWidth;
        }else if (document.body){
                x = document.body.clientWidth;
        }
        return x;
}
function GetHeight(){
        var y = 0;
        if (self.innerHeight){
                y = self.innerHeight;
        }else if (document.documentElement && document.documentElement.clientHeight){
                y = document.documentElement.clientHeight;
        }else if (document.body){
                y = document.body.clientHeight;
        }
        return y;
}