function openwindow (url,wtitle,xsize,ysize)
{
var x,y, windowsize;
x = Math.round ((screen.width - xsize)/2);
y = Math.round ((screen.height - ysize)/2);

	windowsize = 'left='+x+',top='+y+',width=' + xsize + ', height=' + ysize + ',toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0';
	open_window = window.open(url, wtitle, windowsize );

	if(open_window != null) open_window.focus();
	if(open_window.opener == null ) open_window.opener = window;
}


function modalpopup(url,xsize,ysize) {
x = Math.round ((screen.width - xsize)/2);
y = Math.round ((screen.height - ysize)/2);

	windowsize = "dialogHeight:"+ysize+"px; dialogWidth:"+xsize+"px;edge:Raised;center:Yes;scroll:No;help:No;resizable:No;status: No;"
	var arrRet = window.showModalDialog(url,"",windowsize);
}

function showModelessResize(url,xsize,ysize,resize) {
x = Math.round ((screen.width - xsize)/2);
y = Math.round ((screen.height - ysize)/2);

	windowsize = "dialogHeight:"+ysize+"px; dialogWidth:"+xsize+"px;edge:Raised;center:Yes;scroll:No;help:No;resizable:"+resize+";status: No;"
	var arrRet = window.showModelessDialog(url,"",windowsize);
}