function isFill (elem)
{
	var flag;
	
	if (elem.value == "" || elem.value == null)
		flag = false;
	else 
		flag = true;
		
	return flag;
}

function validate (val, fld)
{
    var flag;
    
    if (isFill(val) == false) {
       alert('Please fill in your '+fld+'.');
       val.focus();
       flag = false; 
    } 
	 else if (val.value.indexOf('\'')>=0 || val.value.indexOf('\"')>=0|| val.value.indexOf(',')>=0|| val.value.indexOf('.')>=0|| val.value.indexOf('-')>=0) 
	 {
	 	 alert('Please only use letters or numbers');
       val.focus();
       flag = false;
	 }
	else	
    	flag = true;
    	
   return flag; 
}

function min_length(val,val2,fld)
{	
	var flag;
	
	if (val.value.length < 5)
	{
		alert('Your '+fld+' should be at least 5 characters. \nPlease choose another one.');
		val.value='',val2.value = '';
		val.focus();
		flag = false; 
	} 
	else
		flag = true;
	
	return flag;
}