function elemOn(elem_id){
		if(document.getElementById(elem_id))
			document.getElementById(elem_id).style.display = "block";
	}
	function elemOff(elem_id){
		if(document.getElementById(elem_id))
			document.getElementById(elem_id).style.display = "none";
	}
	function hideAllAbout(){
	
		elemOff("services_title");
		elemOff("services_text");
		elemOff("planning_title");
		elemOff("planning_text");
		elemOff("solutions_title");
		elemOff("solutions_text");
		elemOff("results_title");
		elemOff("results_text");
		elemOff("background_title");
		elemOff("background_text");
	}
	function hideAllProject()
	{
		element1 = document.getElementById("project_title");
		element1 = document.getElementById("project_text");
		
		if( typeof element1.children == 'undefined' ) 
		{
			<!-- We are using mozilla -->
			children = element1.childNodes;
		}
		else
		{
			<!-- we are using IE -->
			children = element1.children;
		}
		var selectCount = children.length;
		for (var j = 0; j < selectCount; j++) 
		{
			children[j].style.display = "none";
		}
		
		if( typeof element2.children == 'undefined' )
		{
			<!-- We are using mozilla -->
			children = element2.childNodes;
		}
		else
		{
			<!-- we are using IE -->
			children = element2.children;
		}
		var selectCount = children.length;
		for (var j = 0; j < selectCount; j++) 
		{
			children[j].style.display = "none";
		}
	}

	function showAboutItem(item_id)
	{
	
		hideAllAbout( );
		switch (item_id)
		{
		case "1":
		elemOn("planning_title");
		elemOn("planning_text");
		break;
		case "2":
		elemOn("solutions_title");
		elemOn("solutions_text");
		break;
		case "3":
		elemOn("results_title");
		elemOn("results_text");
		break;		
		case "0":
		elemOn("services_title");
		elemOn("services_text");
		break;
		case "4":
		elemOn("background_title");
		elemOn("background_text");
		break;
		}
		
	}
	function showProjectText(project_id)
	{
		hideAllAbout( );
	}