function OpenCentreWindow(source)
{
var h=470; // height of window
var w=700; // width of window
var leftPos=(screen.width/2)-(w/2); // left position of window
var topPos=(screen.height/2)-(h/2); // top position of window
var pos='left='+leftPos+',top='+topPos;
props=pos+',width='+w+',height='+h;
window.open(source,'new',props);
}


function OpenCentreWindowL(source)
{
var h=540; // height of window
var w=700; // width of window
var leftPos=(screen.width/2)-(w/2); // left position of window
var topPos=(screen.height/2)-(h/2); // top position of window
var pos='left='+leftPos+',top='+topPos;
props=pos+',width='+w+',height='+h;
window.open(source,'new',props);
}

function OpenCentreWindowS(source)
{
var h=350; // height of window
var w=500; // width of window
var leftPos=(screen.width/2)-(w/2); // left position of window
var topPos=(screen.height/2)-(h/2); // top position of window
var pos='left='+leftPos+',top='+topPos;
props=pos+',width='+w+',height='+h;
window.open(source,'new',props);
}

function OpenCentreWindowW(source)
{
var h=550; // height of window
var w=550; // width of window
var leftPos=(screen.width/2)-(w/2); // left position of window
var topPos=(screen.height/2)-(h/2); // top position of window
var pos='left='+leftPos+',top='+topPos;
props=pos+',width='+w+',height='+h;
window.open(source,'new',props);
}

function OpenCentreWindowXL(source)
{
h=540; // height of window
var w=1200; // width of window
var leftPos=(screen.width/2)-(w/2); // left position of window
var topPos=(screen.height/2)-(h/2); // top position of window
var pos='left='+leftPos+',top='+topPos;
props=pos+',width='+w+',height='+h;
window.open(source,'new');
}