function $(obj) {
   if(document.getElementById) {
        if(document.getElementById(obj)!=null) {
            return document.getElementById(obj)    
        } else  {
           return "";
       }
    } else if(document.all) {
        if(document.all[obj]!=null) {
            return document.all[obj]
        } else  {
          return "";
       }
 }
}
	function divswitch(c, a, b) {
	if(c.length < 1) { return; }
	if($(c).style.display == "none") 
		{
			$(c).style.display = "block";
			$(a).style.display = "none";
			$(b).style.display = "block";
		}
	else 
		{
			$(c).style.display = "none";
			$(a).style.display = "block";
			$(b).style.display = "none";
		}
	}

	function othrtxt(a, b) {
	
		if(eval("document.MatriForm."+a+".checked")==true)		
		{eval("document.MatriForm."+b+".disabled = false");}
		else 
		{eval("document.MatriForm."+b+".disabled = true");}	
	}