function trim(str){
  if (str.length < 1) {
    return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
  }else{
    return str;
  }
}
function checkEmpty(strng,error_msg){
  
  var error = "";
  if (strng.length < 1) {
    error = error_msg+"\n";
  }
 
  return error;
  
}

function validateEmptyNumeric(fld,error_msg,min_length){

    var error = "";
 
    if (fld.value.length == 0 || isNaN(fld.value) || min_length > fld.value.length ) {
 
        error = error_msg+"\n";
        
    } else {

    }
    
    return error;  


}

function validateEmptyString(fld,error_msg,min_length){

    var error = "";
 
    if (fld.value.length == 0 || min_length > fld.value.length ) {
 
        error = error_msg+"\n";
        
    } else {

    }
    
    return error;  


}

function checkMatch(strng1,strng2,error_msg){
  
  var error = "";
  
  if (strng1 != strng2) {
    error = error_msg+"\n";
  }
 
  return error;
  
}


function isValidEmail(str,error_msg) {

  var error = "";

  if ( (str.indexOf(".") > 2) && (str.indexOf("@") > 0) ){
  
  }else{

    error = error_msg+"\n";
  
  }
  
  return error;

}