function showLine(obj,width){
var line=document.getElementById('redline');
var curleft=0;
if(obj.offsetParent){
do{curleft+=obj.offsetLeft;}
while(obj=obj.offsetParent);}
line.style.display='inline';
line.style.left=curleft+'px';
line.style.width=width+'px';
line.style.height=5+'px';}
function hideLine(){
var obj=document.getElementById('redline');
obj.style.display='none';}