/***********************************************
* Required field(s) validation v1.10- By NavSurf
* Visit Nav Surf at http://navsurf.com
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

function checkForm() {

sn = document.getElementById("surName").value;
fn =  document.getElementById("firstName").value;
bd =  document.getElementById("birthDate").value;

		hideAllErrors();
		
		//  Check SurName entered
		if (sn == "" || sn == null)
		{
		hideAllErrors();
		document.getElementById("surNameError").style.display = "inline";		
		document.getElementById("surName").select();
		document.getElementById("surName").focus();		
		return false;
		} 
				
		//  Check FirstName entered
		if (fn == "" || fn == null)
		{		
		hideAllErrors();			
		document.getElementById("firstNameError").style.display = "inline";	
		document.getElementById("firstName").select();
		document.getElementById("firstName").focus();		
		return false;
		}
				
		//  Check BirthDate entered
		if (bd == "" || bd == null)
		{		
		hideAllErrors();			
		document.getElementById("birthDateError").style.display = "inline";	
		document.getElementById("birthDate").select();
		document.getElementById("birthDate").focus();		
		return false;
		}
		
		//  Check BirthDate valid
		if ( !(isDate(bd,0)) )
		{		
		document.getElementById("birthDateError").style.display = "inline";	
		document.getElementById("birthDate").select();
		document.getElementById("birthDate").focus();		
		return false;
		}
				
		return true;
		}
		
function hideAllErrors() 
		{
		document.getElementById("surNameError").style.display = "none";
		document.getElementById("firstNameError").style.display = "none";
		document.getElementById("birthDateError").style.display = "none";
		document.getElementById("detailsError").style.display = "none";
		return true;
		}
		


// numbers only

function numbersonly(winObj,e) {

	var key;
	if(e && e.which){   
		key = e.which  
	} else {  
		key = e.keyCode;  
	}  
	
  	if (key) {
    		keychar = String.fromCharCode(key);
    		keychar = keychar.toLowerCase();
  		}
  
  	if ((key==null) || (key==0) || (key==8) || 
		 (key==9) || (key==13) || (key==27) )
		 return true;
		//  numbers
		else if ((("0123456789.").indexOf(keychar) > -1))
			return true;
		else
		 return false;
	}