function disabletext(x,y) {
	var objr = document.getElementById(x);
	var objt = document.getElementById(y);
	
	if (objr.checked == true) {
  		objt.disabled=false;
		objt.style.background = "#FFFFFF";
		objt.style.background = "#FFFFFF";
		if(objt.value == ""){
			objt.focus();
			return false;
		}
		else {
			return true; 
		}
		
 	} else {
  		objt.disabled=true;
  		objt.value= "";
		objt.style.background = "#CCCCCC";
 	}
	}