function showHide(subText)
{
var textBlock=document.getElementById(subText);
var imgSign=document.getElementById('g'+subText);
if(textBlock.style.display=='block')
{
textBlock.style.display='none';
imgSign.src='global/plus.gif';
imgSign.alt='click to expand'}
else
{
textBlock.style.display='block';
imgSign.src='global/minus.gif';
imgSign.alt='click to collapse'}
}