// JScript File
   
    function checkDisabled() {
        var i =0;
        var obj;
        var bl=false;
        var flg =true;
        
        for (i = 1; i < doc.length; i++) {
           
            obj = getEl(chk+i);
            //alert(chk+i);
            if (obj != null) {
               // obj.disabled=true;
               obj.setAttribute('disabled','true');
            }
        }
    }
    
    function checkOption() {

	var i=0;
	var obj;
	var obj1;
	var bl=false;
	var flg=true;	

    obj1 = getEl(chk+i);
    
	for (i=1; i<doc.length ;i++){
		obj = getEl(chk+i);

		if (obj != null) {//	alert('true');
			if (obj1.checked==true) {	
			    obj.disabled=true; obj.checked=false;
			}else {obj.disabled=false;  }			
		}	
	}	
}

function getEl(id){
	if(document.getElementById){ //all DOM browsers
		return document.getElementById(id);
	}else if(document.all){ //IE 4 fall-back
		return document.all[id];
	}else if(document.layers){ //Netscape 4
		return document.layers[id];//but that will only find positioned
	//elements on Netscape 4.
	}
return null; //no suitable method exists on this browser.
}