function checkForm(css_class,lang) {	
	
	switch (lang) {
		case 'EN': first_block  = 'The field '; second_block = ' is compulsory';
			break
		case 'HO': first_block  =  'Het veld '; second_block = ' is verplicht';
			break
		case 'FR': first_block  =  'Le champ '; second_block = ' est obligatoire';
			break
		case 'AL': first_block  = 'The field '; second_block = ' es obligatorio';
			break
		default:   first_block  =  'El campo '; second_block = ' es obligatorio';
	} 
	
	requerido = document.getElementsByClassName(css_class);	
	
	for( i=0; i < requerido.length; i++ ) 
	{		
		var count = requerido[i].value.length;		
		
		if ( count == 1 && requerido[i].value.substring( 0, 1 ) == " ") 
		{
			count = -1;
			requerido[i].value = "";					
		}
		
		for ( c=0; c <= count; c++ )
		{
			if ( requerido[i].value.substring(0,1) == " " ) 
			{
				requerido[i].value = requerido[i].value.substring( 1, count );
				c = -1; count--;
			}
		}		
		
		if ( requerido[i].value == "" ) 
		{
			alert( first_block + "\"" + requerido[i].name.replace( "_", " " ) + "\"" + second_block + ".");
			$( requerido[i].id ).value = "";
			$( requerido[i].id ).focus();
			return false;
		}

		
	}
	
	return true;	
}