/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/

var offsetfrommouse = [15, 0]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration = 0; //duration in seconds image should remain visible. 0 for always.

var defaultimageheight = 200; // maximum image size.
var defaultimagewidth = 200; // maximum image size.

var timer;

function gettrailobj() {
    if (document.getElementById)
        return document.getElementById("preview_div").style;
}

function gettrailobjnostyle() {
    if (document.getElementById)
        return document.getElementById("preview_div");
}


function truebody() {
    return (!window.opera && document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body;
}


function hidetrail() {
    gettrailobj().display = "none";
    document.onmousemove = "";
    gettrailobj().left = "-1000px";
    gettrailobj().top = "-1000px";
    //	clearTimeout(timer);

}

function showtrail(imagename, title) {

    defaultimageheight = 200;
    defaultimagewidth = 200;
    var imgObj = new Image();
    imgObj.src = imagename;

    i = imagename;
    t = title;
    w = imgObj.width;
    h = imgObj.height;
    //	timer = setTimeout("show('"+i+"',t,w,h);",200);
    show(i, t, w, h);

}

function show(imagename, title, width, height) {
    var docwidth = document.all ? truebody().scrollLeft + truebody().clientWidth : pageXOffset + window.innerWidth - offsetfrommouse[0];
    var docheight = document.all ? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);

    if ((navigator.userAgent.indexOf("Konqueror") == -1 || navigator.userAgent.indexOf("Firefox") != -1 || (navigator.userAgent.indexOf("Opera") == -1 && navigator.appVersion.indexOf("MSIE") != -1)) && (docwidth > 650 && docheight > 500)) {
        (width == 0) ? width = defaultimagewidth : '';
        (height == 0) ? height = defaultimageheight : '';

        width += 30;
        height += 55;
        defaultimageheight = height; // maximum image size.
        defaultimagewidth = width; // maximum image size.

        newHTML = '<div class="border_preview" align="middle"  style=" background:#FFFFFF;width:' + width + 'px;height:' + height + 'px;border:#dedede solid 1px;">';
        newHTML += '<div style="text-align: center" id="loader_container"><div id="loader">';
        newHTML += '<div style="text-align: center" align="center">Loading image...</div><div id="loader_bg"><div id="progress"> </div></div></div></div>';
        newHTML += '<div class="preview_temp_load"><div class="preview_title" style="color:#1974bd; text-align: center;"><b>' + title + '</b></div>';
        newHTML += '<img align="center" onload="javascript:remove_loading(this);" src="' + imagename + '" border="0"></div>';
        newHTML += '</div>';

        if (navigator.userAgent.indexOf("MSIE") != -1 && navigator.userAgent.indexOf("Opera") == -1) {
            newHTML = newHTML + '<iframe src="about:blank" scrolling="no" frameborder="0" width="' + width + '" height="' + height + '"></iframe>';
        }

        document.onmousemove = followmouse;
        gettrailobjnostyle().innerHTML = newHTML;
        gettrailobj().display = "block";


    }
}

function followmouse(e) {

    var xcoord = offsetfrommouse[0];
    var ycoord = offsetfrommouse[1];

    var docwidth = document.all ? truebody().scrollLeft + truebody().clientWidth : pageXOffset + window.innerWidth - 15;
    var docheight = document.all ? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);

    if (typeof e != "undefined") {
        if (docwidth - e.pageX < defaultimagewidth + 2 * offsetfrommouse[0]) {
            xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += e.pageX;
        }
        if (docheight - e.pageY < defaultimageheight + 2 * offsetfrommouse[1]) {
            ycoord += e.pageY - Math.max(0, (2 * offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
        } else {
            ycoord += e.pageY;
        }

    } else if (typeof window.event != "undefined") {
        if (docwidth - event.clientX < defaultimagewidth + 2 * offsetfrommouse[0]) {
            xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += truebody().scrollLeft + event.clientX;
        }
        if (docheight - event.clientY < (defaultimageheight + 2 * offsetfrommouse[1])) {
            ycoord += event.clientY + truebody().scrollTop - Math.max(0, (2 * offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
        } else {
            ycoord += truebody().scrollTop + event.clientY;
        }
    }
    gettrailobj().left = xcoord + "px";
    gettrailobj().top = ycoord + "px";

}