var selected_tab = 'tab1';
var selected_image_src = 'tab_what_we_do';

function selectTab(tab,img)
{
	document.getElementById(selected_tab).className = 'tab';
	document.getElementById(selected_tab+'_body').style.display = 'none';
	document.getElementById(selected_tab+'_img').src = 'pics/'+selected_image_src+'.gif';
	
	document.getElementById(tab).className += ' selected';
	selected_tab = tab;
	selected_image_src = img;
	
	document.getElementById(tab+'_body').style.display = 'block';
	document.getElementById(tab+'_img').src = 'pics/'+img+'b.gif';

}