function openWindow() {
window.open("","JSL",'toolbar=0,location=0,scrollbars=0,width=300,height=300,resizable=1,top=20,left=20');
}

function openWindow1() {
window.open("","JSL1",'toolbar=0,location=0,scrollbars=0,width=550,height=400,resizable=1,top=20,left=20');
}

function openWindow2() {
window.open("","JSL2",'toolbar=0,location=0,scrollbars=0,width=550,height=400,resizable=1,top=20,left=20');
}

function openWindow3() {
window.open("","JSL3",'toolbar=0,location=0,scrollbars=0,width=550,height=400,resizable=1,top=20,left=20');
}

function openWindow4() {
window.open("","JSL4",'menubar=1,toolbar=0,location=0,scrollbars=1,width=740,height=500,resizable=0,top=20,left=20');
}

function clearText(thefield){
 if (thefield.defaultValue==thefield.value)
 thefield.value = ""
}
 
function openJSLWindow() {
iMyWidth = (window.screen.width/2) - (250 + 10)
iMyHeight = (window.screen.height/2) - (150 + 25)
Fokus = window.open("", "JSL5","height=300,width=500,resizable=no,left=" + iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight + ",scrollbars=yes");
Fokus.focus()
}