function showhide(src,img){
	var imgopen = 'images/minus.gif';
	var imgclose = 'images/plus.gif';
//alert(src);
		if(document.getElementById(src).style.display == 'none'){
			document.getElementById(src).style.display = 'block';
			document.getElementById(img).src = imgopen;

		}
		else 
		{
			document.getElementById(src).style.display = 'none';
			document.getElementById(img).src = imgclose;
		}
//	chkHeight();
}