var objWin = null;

function openPop(strUrl,wndw,x,y,w,h){ // there must be a global var: objWin
	if(objWin && !objWin.closed) objWin.close();
	var the_u = strUrl;
	objWin = window.open(the_u,wndw,"left="+x+",top="+y+",width="+w+",height="+h+",resizable=1,scrollbars=0");
}