var currentMenuIndex = 0;

function showContent(val){
	if(val!=currentMenuIndex){
		$('.toggle-content').hide();	
		$('.left-menu-item').removeClass('active-left-menu');	
		$('#content-'+val).fadeIn('fast');	
		$('#menu-item-'+val).addClass('active-left-menu');
		
		currentMenuIndex = val;
	}
}