function ParentStyling() {
        this.hovered = "url('http://www.pneumatiky.eu/imgs/tab_blue.png')"
        this.selected = "url('http://www.pneumatiky.eu/imgs/tab_black.png')"
        this.notdefined = "url('')"
}

function ParentStylingOnMouseEnter(node) {
       var child = node.getElementsByTagName("div")[0]
       if (node.className != "selected") {
           node.style.backgroundImage=this.hovered
       }
       if (child != undefined) {
           child.style.cursor="pointer"
           child.style.color="orange"
       }
}
ParentStyling.prototype.onMouseEnter = ParentStylingOnMouseEnter

function ParentStylingOnMouseLeave(node) {
        var bkg = this.notdefined
        var child = node.getElementsByTagName("div")[0]
        if (node.className == "selected") {
            bkg = this.selected
            if (child != undefined) {
                child.style.color="white"
            }
        } else {
            if (child != undefined) {
                child.style.color="black"
            }
        }
        node.style.backgroundImage=bkg
        if (child != undefined) {
            child.style.cursor="default"
        }
}
ParentStyling.prototype.onMouseLeave = ParentStylingOnMouseLeave

var parentStyling = new ParentStyling()