function chk_height(){

if(navigator.userAgent.indexOf("Netscape")!=-1){ // ns requires the overflow to be set to auto to work?
document.getElementById("div1").style.overflow="auto"
}

div1_height=parseInt(document.getElementById("div1").style.height) // div1 height
div2_height=parseInt(document.getElementById("div2").style.height) // div2 height
height_offset=div1_height - div2_height // height difference

document.getElementById("temp_div").style.height = document.getElementById("div1").scrollHeight - height_offset
document.getElementById("div1").scrollTop = document.getElementById("div2").scrollTop
}