if (document.images) {
		buttonbackgra = new Image
		buttonbackcol = new Image
		buttonobjgra = new Image
		buttonobjcol = new Image
		buttonchargra = new Image
		buttoncharcol = new Image
		buttondetgra = new Image
		buttondetcol = new Image
		buttonsculptgra = new Image
		buttonsculptcol = new Image
		
		buttonbackgra.src = "img/nav_back_gra.gif"
		buttonbackcol.src = "img/nav_back_col.gif"
		buttonobjgra.src = "img/nav_obj_gra.gif"
		buttonobjcol.src = "img/nav_obj_col.gif"
		buttonchargra.src = "img/nav_char_gra.gif"
		buttoncharcol.src = "img/nav_char_col.gif"
		buttondetgra.src = "img/nav_details_gra.gif"
		buttondetcol.src = "img/nav_details_col.gif"
		buttonsculptgra.src = "img/nav_sculpt_gra.gif"
		buttonsculptcol.src = "img/nav_sculpt_col.gif"
	}
	else {
		buttonbackgra = ""
		buttonbackcol = ""
		buttonobjgra = ""
		buttonobjcol = ""
		buttonchargra = ""
		buttoncharcol = ""
		buttondetgra = ""
		buttondetcol = ""
		buttonsculptgra = ""
		buttonsculptcol = ""
		
		document.buttonback = ""
		document.buttonobj = ""
		document.buttonchar = ""
		document.buttondet = ""
		document.buttonsculpt = ""
	}