// JavaScript Document


function changeoverit(id)
{
	if(id=='MainSubMenuBlock1')
	{ 
	 document.getElementById(id).style.display='';
	 document.getElementById("MainSubMenuBlock2").style.display='none';
	 document.getElementById("MainSubMenuBlock3").style.display='none';
	 document.getElementById("MainSubMenuBlock4").style.display='none';
	 document.getElementById("tab1").src = "images/navi/we_butro.jpg";
	 document.getElementById("tab2").src = "images/navi/whatwedo_but.jpg";
	 document.getElementById("tab3").src = "images/navi/whowedo_but.jpg";
	 document.getElementById("tab4").src = "images/navi/howwedo_but.jpg";
	 }
	
	
	if(id=='MainSubMenuBlock2')
	{
		document.getElementById(id).style.display='';
		document.getElementById("MainSubMenuBlock1").style.display='none';
		document.getElementById("MainSubMenuBlock3").style.display='none';
		document.getElementById("MainSubMenuBlock4").style.display='none';
	 document.getElementById("tab1").src = "images/navi/we_but.jpg";
	 document.getElementById("tab2").src = "images/navi/whatwedo_butro.jpg";
	 document.getElementById("tab3").src = "images/navi/whowedo_but.jpg";
	 document.getElementById("tab4").src = "images/navi/howwedo_but.jpg";
	}
	
	if(id=='MainSubMenuBlock3')
	{
		document.getElementById(id).style.display='';
		document.getElementById("MainSubMenuBlock1").style.display='none';
		document.getElementById("MainSubMenuBlock2").style.display='none';
		document.getElementById("MainSubMenuBlock4").style.display='none';
		 document.getElementById("tab1").src = "images/navi/we_but.jpg";
	 document.getElementById("tab2").src = "images/navi/whatwedo_but.jpg";
	 document.getElementById("tab3").src = "images/navi/whowedo_butro.jpg";
	 document.getElementById("tab4").src = "images/navi/howwedo_but.jpg";
	}
	
	if(id=='MainSubMenuBlock4')
	{
		document.getElementById(id).style.display='';
		document.getElementById("MainSubMenuBlock1").style.display='none';
		document.getElementById("MainSubMenuBlock2").style.display='none';
		document.getElementById("MainSubMenuBlock3").style.display='none';
	 document.getElementById("tab1").src = "images/navi/we_but.jpg";
	 document.getElementById("tab2").src = "images/navi/whatwedo_but.jpg";
	 document.getElementById("tab3").src = "images/navi/whowedo_but.jpg";
	 document.getElementById("tab4").src = "images/navi/howwedo_butro.jpg";
	}
	
}