function tab1(val, name, num){
	var b = name;
	var a = val;
	for (var i=1;i<=num;i++){
		if(i==a)
		{
		 
		document.getElementById(b+'_'+i).style.display="block";
			document.getElementById(b+'_L'+i).className="cc1";
			document.getElementById(b+'_M'+i).className="cc2";
			document.getElementById(b+'_R'+i).className="cc3";
		}
		else
		{
		document.getElementById(b+'_'+i).style.display="none";
			document.getElementById(b+'_L'+i).className="cw";
			document.getElementById(b+'_M'+i).className="cc4";
			document.getElementById(b+'_R'+i).className="cw";

			}
		}
}