var pagename;
var NN=(navigator.appName == "Netscape" &&
navigator.userAgent.indexOf("Mozilla") != -1 &&
parseInt(navigator.appVersion) >= 5);
var IE=(navigator.userAgent.indexOf("MSIE") != -1 &&
navigator.userAgent.indexOf("Mozilla") != -1 &&
parseInt(navigator.appVersion) >= 4); 
var chooseimage;
var chooseimaget;
var X = 0;
var Y = 0;
var dochooseimage=0;

function md(e) {
    if(NN) {
        X = e.pageX;
        Y = e.pageY;
    }
    if(IE) {
        X = event.clientX + document.body.scrollLeft;
        Y = event.clientY + document.body.scrollTop;
    }
    chooseimage.src = "/cgi-bin/public/images.cgi?mode=choose&fn=" + pagename + "&x=" + X + "&y=" + Y + "&t=" + chooseimaget;
}
function chooseimageload() {
    if(dochooseimage) {
        chooseimage.src = "/cgi-bin/public/images.cgi?mode=choose&fn=" + pagename + "&t=" + chooseimaget;
    }
}
function claimmousedown() {
    if(IE || NN) { // only sure this works on IE and mozilla
        dochooseimage=1;
        document.onmousedown = md;
        chooseimage=new Image();
        chooseimageload();
    }
}