function tab1()
{
document.getElementById('tab1').className="rakhic1";
document.getElementById('tab2').className="rakhif";
document.getElementById('tab3').className="rakhit";
document.getElementById('r_c').className="on";
document.getElementById('r_f').className="off";
document.getElementById('r_t').className="off";



}


function tab2()
{
document.getElementById('tab1').className="rakhic";
document.getElementById('tab2').className="rakhif1";
document.getElementById('tab3').className="rakhit";
document.getElementById('r_c').className="off";
document.getElementById('r_f').className="on";
document.getElementById('r_t').className="off";
}


function tab3()
{
document.getElementById('tab1').className="rakhic";
document.getElementById('tab2').className="rakhif";
document.getElementById('tab3').className="rakhit1";
document.getElementById('r_c').className="off";
document.getElementById('r_f').className="off";
document.getElementById('r_t').className="on";
}



function tabn1()
{
document.getElementById('form').style.display="block";
document.getElementById('form1').style.display="none";
document.getElementById('form2').style.display="none";
document.getElementById('form3').style.display="none";
}


function tabn2()
{document.getElementById('form').style.display="none";
document.getElementById('form1').style.display="block";
document.getElementById('form2').style.display="none";
document.getElementById('form3').style.display="none";
}


function tabn3()
{document.getElementById('form').style.display="none";
document.getElementById('form1').style.display="none";
document.getElementById('form2').style.display="block"
document.getElementById('form3').style.display="none";
}


function tabn4()
{document.getElementById('form').style.display="none";
document.getElementById('form1').style.display="none";
document.getElementById('form2').style.display="none";
document.getElementById('form3').style.display="block";
}


function blowup()
{
document.getElementById('blowup').className="black";
}


function blowupclose()
{
document.getElementById('blowup').className="off";
}