function validateCallback(comp_id){	
	var error = "";
	  
	  var first_name= document.getElementById("First_Name_" + comp_id).value != "";
	    if(!first_name) { error += " -First Name\n"; }
	  
	  var last_name= document.getElementById("Last_Name_" + comp_id).value != "";
	    if(!last_name) { error += " -Last Name\n"; }
	  
	  var Area_Code  = document.getElementById("Area_Code_" + comp_id).value != "";
	  var Phone_Number  = document.getElementById("Phone_Number_" + comp_id).value != "";

	 
	 if(!Area_Code || !Phone_Number ) { error += " -Area Code and Phone Number\n"; }
	  
	   if(error.length > 0){
	      error = "We're sorry.\nThe following fields cannot be blank:\n" + error;
	      alert(error);
	      return false;
	    }
	    return true;
	  }