Enter Trigger activate Gui Texture

If player enter a trigger, then activate a GuiTexture. If player leave this trigger, then disable(so inactivate) the GuiTexture. How can I do this?

var guiToggle : boolean = false;

function OnTriggerEnter(item : Collider) {
    if(item.tag == "Player")
        guiToggle = true;
}

function OnTriggerExit(item : Collider) {
    if(item.tag == "Player")
        guiToggle = false;
}

function OnGUI () {
    if(guiToggle) {
        //GUI code here
    }
}