/*************************************************************************

    This code is from Dynamic Web Coding at dyn-web.com

    Copyright 2008 by Sharon Paine 

    See Terms of Use at www.dyn-web.com/business/terms.php

    regarding conditions under which you may use this code.

    This notice must be retained in the code as is!

    

    for use with dw_rotator.js

*************************************************************************/





// display image at random

// rObj: object literal holding data 

function dw_getRandomImage(rObj) {

    var imgAr = rObj.images;  if (!imgAr ) return;

    var num = Math.floor( Math.random() * imgAr.length );

    var imgStr = '';   var imgFile = imgAr[ num ];

    rObj.num = num; // hold which img selected

    var path = rObj.path || ''; var id = rObj.id || '';

    var title, alt = '', url;

    // If there are *any* entries for actions, alt or title include them here 

    if (rObj.alt) {

        alt = rObj.alt[num]? rObj.alt[num]: rObj.alt[0]? rObj.alt[0]: '';

    }

    if (rObj.title) {

        title = rObj.title[num]? rObj.title[num]: rObj.title[0]? rObj.title[0]: '';

    }

    if (rObj.actions) {

        url = rObj.actions[num]? rObj.actions[num]: rObj.actions[0]? rObj.actions[0]: null;

    }

    if (url) {

        imgStr += '<a href="';

        imgStr += typeof url == 'string'? url: 'javascript: void ' + url;

        imgStr += '">';

    }

    

    imgStr += '<img src="' + path + imgFile + '"';

    imgStr += id? ' id="' + id + '"': '';

    if (title) {

        imgStr += ' title="' + title + '"';

    }

    imgStr += ' alt="' + alt + '" border="0" />';

    if (url) {

        imgStr += '</a>';

    }

    document.write(imgStr); document.close();



}



/////////////////////////////////////////////////////////////////////

//  code to add stop/restart links



dw_Rotator.addControls = function() {

    var els = dw_getElementsByClassName('rotator_controls');

    for (var i=0; els[i]; i++) {

        var links = els[i].getElementsByTagName('a');

        for (var j=0; links[j]; j++) {

            if ( dw_hasClass( links[j], 'stop') ) {

                links[j].onclick = function () { dw_Rotator.stop(); return false }

            } else if ( dw_hasClass( links[j], 'start') ) {

                links[j].onclick = function () { dw_Rotator.restart(); return false }

            } 

        }

        els[i].style.display = 'block';

    }

}



// restart rotation for all instances 

dw_Rotator.restart = function() {

    var len = dw_Rotator.col.length, obj;

    for (var i=0; i<len; i++) {

        obj = dw_Rotator.col[i];

        if (obj && obj.id ) //obj.rotate(); // no delay? 

            obj.timer = setTimeout( obj.animString + ".rotate()", dw_Rotator.resumeDelay );

    }

}



function dw_hasClass(el, cl) {

    var re = new RegExp("\\b" + cl + "\\b", "i");

    if ( re.test( el.className ) ) {

        return true;

    }

    return false;

}



function dw_getElementsByClassName(sClass, sTag, oCont) {

    var result = [], list, i;

    var re = new RegExp("\\b" + sClass + "\\b", "i");

    oCont = oCont? oCont: document;

    if ( document.getElementsByTagName ) {

        if ( !sTag || sTag == "*" ) {

            list = oCont.all? oCont.all: oCont.getElementsByTagName("*");

        } else {

            list = oCont.getElementsByTagName(sTag);

        }

        for (i=0; list[i]; i++) 

            if ( re.test( list[i].className ) ) result.push( list[i] );

    }

    return result;

};





/////////////////////////////////////////////////////////////////////

// example use of function pointer in actions

// id: id by which the instance can be obtained using dw_Rotator.getInstanceById

// (id passed to constructor - id attached to img tag)

function displayImgInSubWin(id) {

    var rObj = dw_Rotator.getInstanceById(id);

    var file = rObj.imgs[rObj.ctr].src;

    openSubWin(file);

    return false;

}



// arguments: file to open, subwindow name, left, top, width, height, other attributes

// common attributes: (comma separator, no spaces!)

// "resizable,scrollbars,toolbar,location,directories,status,menubar"

// all but url are optional with defaults provided below 

function openSubWin(url, nm, x, y, w, h, atts) {

    nm = nm || "subwindow";

    atts = atts || "menubar,resizable,scrollbars";

    w = w || 600; h = h || 450;

    x = (typeof x=="number")? x: Math.round( (screen.availWidth - w)/2 );

    y = (typeof y=="number")? y: Math.round( (screen.availHeight - h)/2 );

    atts += ',width='+w+',height='+h+',left='+x+',top='+y;

    var win = window.open(url, nm, atts); 

    if (win) {

        if (!win.closed) { win.resizeTo(w,h); win.moveTo(x,y); win.focus(); return false; }

    } 

    return true;

}