var msgError = "";
var hasj = {};
var formDebug = false;
function isNull( objObj ){
 if( typeof( objObj ) == 'undefined' ){ return true; }
 if( objObj === null ){ return true; }
 if( objObj == "" ){ return true; }
 if( objObj == 0 ){ return true; }
 return false;
}
function ifNull( objObj, strReplace ){
 if( isNull( objObj ) === true ){ return strReplace; }
 return objObj;
}
function getCSSobj( objCss, objElement ){
 var myCSS = {};
 for( i in objCss ){
  myCSS[ i ] = $(objElement).css( i );
 }
 return myCSS;
}
function setBorder( objElement, intFlag){
 var css = {
  'background-color': 'rgb(255, 150, 150)',
  'color': 'maroon',
  'border-width': '1px',
  'border-style': 'solid',
  'border-color': 'red'
 };
 var strElement = objElement.id
 if( isNull( strElement ) === true )
  { 
  msgError += "DEVELOPER ALERT: your element [" + ifNull(objElement.name, '??') + "] has not got an ID\n"; 
  }
 if( /checkbox/.test( objElement.type ) === true ){
  objElement = $(objElement).parent().get(0);
 }
 if( intFlag === true ){
  if( isNull( hasj[ strElement ] ) === false ){
   $(objElement).css( hasj[ strElement ] );
   delete hasj[ strElement ];
  }
 } else {
  if( isNull( hasj[ strElement ] ) === true ){
   hasj[ strElement ] = getCSSobj( css, objElement );
  }
  $(objElement).css( css );
 }
}
function chPassword(objPass){
 var passes = $(objPass).find(":password");
 var cpass = 0;
 var ret = true;
 passes.each( function(i){
  if( isNull(this.value) === true ){ ret = false; return; }
  if( cpass == 0 ){
   cpass = this.value;
  } else {
   if( cpass !== this.value ){
    msgError = "Passwords do not match!\n";
    ret =  false; return;
   }
  }
  // set the password combination rules here
  if ( /^([a-z]+|[A-Z]+|\d+|\s+)$/.test( this.value ) || this.value.length < 5 ){
   msgError = "Password too simple..";
   ret = false; return;
  }
 } );
 return ret;
}
function chValue( objObj ){
 var val = "";
 if( /checkbox/.test( objObj.type ) ){
  val = ( objObj.checked === true ? 1 : null );
 } else {
  val = objObj.value;
 }
 if( isNull(val) === true && isNull($(objObj).attr("allownull")) === true ){
  setBorder( objObj, false );
  if( formDebug === true ){ msgError += objObj.name + ' = empty\n'; }
  if( isNull( $(objObj).attr("errortext") ) === false ){
   msgError += $(objObj).attr("errortext") + "\n";
  }
  return false;
 } else {
  setBorder( objObj, true );
  return true;
 }
}
function chForm( objForm, boolDebug ){
 if( boolDebug === true ){ formDebug = true; }
 var ch = true;
 var strForm;
 if( isNull(objForm) === false ){ strForm = '#' + objForm.id; }
 var passFields = ifNull( $(objForm).find(":password").length , 0);
 $(objForm).find(":input").each( function(i){
  if ( /password|hidden|submit|button/.test( this.type ) === false ){
   if( chValue(this) === false ){ ch = false; }
  }
  if( passFields == 1 && /password/.test( this.type ) === true ){
   if( chValue(this) === false ){ ch = false; }
  }
 });
 if( passFields > 1 ){
  var t = chPassword( objForm );
  if( t === false ){ ch = false; }
  $(objForm).find(":password").each( function(i){
   setBorder(this, t);
  });
 }
 if( msgError && !ch ){ alert( msgError ); msgError = "";}
 return ch;
}