function mainchgn(ii66,val)
	{ 
	  var i=1
		while(document.getElementById("mri_0"+ii66+"_0"+i))
        {
		   document.getElementById("mri_0"+ii66+"_0"+i).style.display="none";
		   i++;
		}
		if(document.getElementById("mri_0"+ii66+"_0"+val))
		{
		document.getElementById("mri_0"+ii66+"_0"+val).style.display="";
		}
		else
		{
		document.getElementById("mri_0"+ii66+"_01").style.display="";
		}
	}