// dom wrapper
function LayerSearch() {
    this.getObject = function(id) {
        if (document.getElementById && document.getElementById(id)) {
            return document.getElementById(id);
        }
        if (document.all && eval('document.' + id)) {
            return eval('document.' + id);
        }
        if (document.layers) {
            return this.searchChild(document,id);
        }
        return null;
    }
    
    this.searchChild = function(obj,id) {
        var i = 0;
        var tmpObj = obj.layers
        var gotObj = null;
        var searchedObj = null;
        if (tmpObj) {
            for (i = 0; i < tmpObj.length; i++) {
                if (tmpObj[i].id == id) { gotObj = tmpObj[i]; }
                else { if (tmpObj[i].layers.length > 0) { searchedObj = this.searchChild(tmpObj[i], id); } }
                if (searchedObj) {
                    gotObj = searchedObj;
                }
                
            }
        }
        return gotObj;
    }
}

function Layer(id) {
    this.obj = null;
    if (id) {
        var ls = new LayerSearch();
        this.obj = ls.getObject(id);
    }
    if (!this.obj) return null;
    if (document.layers) {
        this.width = this.obj.clip.right;
        this.height = this.obj.clip.bottom;
    }
    else {
        this.width = this.obj.style.width;
        this.height = this.obj.style.height;
    }
    this.setWidth = function(w) {
        this.width = w;
        this.obj.style.width = w;
    }
    this.setHeight = function(h) {
        this.height = h;
        this.obj.style.height = h;
    }
    
    this.setDisplay = function(v) {
            if (document.getElementById || document.all) {
                if (v == 'none') {
                    this.obj.style.display = 'none';
                    this.obj.style.visibility = 'hidden';
                }
                else {
                    this.obj.style.display = 'block';
                    this.obj.style.visibility = 'visible';
                }
            }
            else if (document.layers) {
                if (v == 'none') {
                    this.obj.clip.bottom = 0;
                    this.obj.visibility = 'hide';
                    objRootMenu.obj.clip.bottom = 22;
                }
                else {
                    this.obj.visibility = 'show';
                    this.obj.clip.bottom = this.height;
                    objRootMenu.obj.clip.bottom = objRootMenu.height;
                }
            }
    }
    this.left = 0;
}