function hideElements(){
	showIt(0);

}
function showIt(a)
{
	elements = new Array('tab_1','tab_2','tab_3');

	for(i=0;i<elements.length;i++)
	{
		if(i != a)
		{
			if(document.getElementById(elements[i]) != null){
			document.getElementById(elements[i]+"_box").style.visibility = 'hidden';
			document.getElementById(elements[i]+"_box").style.font.weight = 'normal';
			document.getElementById(elements[i]).className = 'tab';
			document.getElementById(elements[i]+"_title").className = 'tab';
		}
		}
		else
		{
			document.getElementById(elements[i]+"_box").style.visibility = 'visible';
			document.getElementById(elements[i]).className = 'selected';
			document.getElementById(elements[i]+"_title").className = 'selected';
		
		}
		
	}
}