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

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

function checkSpamTest(strng,error_msg){

  var error = "";
  if (strng.length < 1) {
    error = error_msg+"\n";
  }else if(isNaN(strng) && strng.toLowerCase() == 'six'){

    // success
  
  }else if(!isNaN(strng) && strng == '6'){
  
    // success
    
  }else{
  
    error = error_msg+"\n";
  
  }
 
  return error;
  
}

function validateEmpty(fld,error_msg) {
    var error = "";
 
    if (fld.value.length == 0) {
        //fld.style.background = 'Yellow'; 
        error = error_msg;
    } else {
        //fld.style.background = 'White';
    }
    return error;  
}


function validateEmptyNumeric(fld,error_msg,min_quan,hilight){

    var error = "";
 
    if (fld.value.length == 0 || isNaN(fld.value) || min_quan > fld.value ) {
//        hilight.style.background = 'Yellow'; 
        error = error_msg;
    } else {
//        hilight.style.background = 'White';
    }
    return error;  


}

function validateFileExtension(fld,error_msg,attention_field_id) {

    var error = "";

  if(!/(\.tiff|\.tif|\.eps|\.pdf|\.gif|\.jpg|\.jpeg)$/i.test(fld)) {
  
      error = error_msg;
//      document.getElementById(attention_field_id).style.background = 'Yellow';
  
  }else{
//      document.getElementById(attention_field_id).style.background = 'White';
  }
  return error;

}