function planwindow1()
{
window.open("bild1.html","tanz1","height=390,width=450,left=10,top=10")
}

function planwindow2()
{
window.open("bild2.html","tanz2","height=390,width=450,left=10,top=10")
}

function planwindow3()
{
window.open("bild3.html","tanz3","height=450,width=450,left=10,top=10")
}

function planwindow4()
{
window.open("bild4.html","tanz4","height=490,width=450,left=10,top=10")
}