/**
 * Switches between the various tabs.
 *
 */
function processPollsTab(tab_num) {
	for (i=0;i<poll_ids.length;i++) {
		tab = document.getElementById('pollAnchor_' + poll_ids[i]);
		tab.setAttribute("class", "oneTab");
		tab.setAttribute("className", "oneTab"); 
		tabElem = document.getElementById('poll_' + poll_ids[i]);
		tabElem.style.display = 'none';
	}
	
	selectedTab = document.getElementById('pollAnchor_' + tab_num);
	selectedTab.setAttribute("class", "oneTab oneTabSelected");
	selectedTab.setAttribute("className", "oneTab oneTabSelected");
	
	selectedTabElem = document.getElementById('poll_' + tab_num);
	selectedTabElem.style.display = 'block';
}