// JavaScript Document
function openWin(winURL,winName,winAttributes,winWidth,winHeight,isCentred){
if(window.screen && isCentred){ // check for boolean attribute to centre the window
var winLeft = (screen.width-winWidth)/2; // window left
var winTop = (screen.height-winHeight)/2; // window top
winAttributes += winAttributes.length ? "," : "";
winAttributes += "left=" + winLeft + ",top=" + winTop; // append to attributes string
}
winAttributes += winAttributes.length ? "," : "";
winAttributes += "width=" + winWidth + ",height=" + winHeight; // append width and height to attributes string
winToOpen = window.open(winURL,winName,winAttributes); // define window
if(window.focus){ // focus window if supported
winToOpen.focus();
}
}