if (document.images) {
tr1 = new Image
tr2 = new Image
st1 = new Image
st2 = new Image
rs1 = new Image
rs2 = new Image
pl1 = new Image
pl2 = new Image
ge1 = new Image
ge2 = new Image
sp1 = new Image
sp2 = new Image
se1 = new Image
se2 = new Image
sr1 = new Image
sr2 = new Image

tr1.src = "../images/icons/bg/tropf1.gif"
tr2.src = "../images/icons/bg/tropf1_1.gif"
st1.src = "../images/icons/bg/steuerung1.gif"
st2.src = "../images/icons/bg/steuerung1_1.gif"
rs1.src = "../images/icons/bg/sensor1.gif"
rs2.src = "../images/icons/bg/sensor1_1.gif"
pl1.src = "../images/icons/bg/plan1.gif"
pl2.src = "../images/icons/bg/plan1_1.gif"
ge1.src = "../images/icons/bg/getriebe1.gif"
ge2.src = "../images/icons/bg/getriebe1_1.gif"
sp1.src = "../images/icons/bg/sprueh1.gif"
sp2.src = "../images/icons/bg/sprueh1_1.gif"
se1.src = "../images/icons/bg/sprueh_eck1.gif"
se2.src = "../images/icons/bg/sprueh_eck1_1.gif"
sr1.src = "../images/icons/bg/sprueh_rot1.gif"
sr2.src = "../images/icons/bg/sprueh_rot1_1.gif"
}