// JavaScript Document
function changeTab(tab, content, This, num, color) 
{
	var len_images = document.tabs.length;
	for(var i=0; i<=len_images-1; i++)
	{			
		if( document.tabs[i].src.indexOf("big")!=-1)
		{	
			var strSrc = document.tabs[i].src;
			document.tabs[i].src = strSrc.replace("big", "small");
			document.tabs[num].src = (document.tabs[num].src).replace("small", "big");
			document.getElementById("tab_links").style.background = color;
			document.getElementById(content).style.display = "block";
			document.getElementById("tab_links").getElementsByTagName("li")[i].className = document.getElementById("tab_links").getElementsByTagName("li")[i].className.replace("_selected", "");
			This.parentNode.className = This.parentNode.className + "_selected";
		}
	}
}