function show_tab(tab_li, appname, appenrollurl, appenrolltext, appenrolltarget)
{
	var tabs, i, classes, j;
	
	if (!appname)
	    appname = '';
	if (!appenrollurl)
	    appenrollurl = '';
	gebi('APPName').value = appname;
	gebi('APPEnrollUrl').href = appenrollurl;
	gebi('APPEnrollUrl').target = appenrolltarget;
	gebi('APPEnrollUrl').innerHTML = appenrolltext;
	
	//if(tab_li.className.split(/\s+/).in_array('login_tab'))
		tabs=document.getElementsByClassName('login_tab');
	
	for(i=0; i<tabs.length; i++)
	{
		classes=tabs[i].className.split(/\s+/);
		for(j=0; j<classes.length; j++)
		{
			if(classes[j]=='selected')
				classes.splice(j, 1);
			if(tabs[i]==tab_li)
				classes.push('selected');
		}
		tabs[i].className=classes.join(' ');
	}
}