function valueToPlaceHolder(divId){
	// this function creates a placeholder based on the attribute 'value' of this same input text field
	//once done, it removes the 'value' attribute
	// it is useful for cforms II plugin cos placholder are not available, while default value attr are
	// THIS :
	// <input xxx value="Prénom - First name" xxx>
	// would return :
	// <input xxx placeholder="Prénom - First name" xxx>
	// see http://stackoverflow.com/questions/11432144/change-value-to-placeholder-input-field
	if( document.getElementById(divId) ){
	  $('input[type="text"]').each(function() { 
	    var $this = $(this); 
	    $this.attr('placeholder', $this.attr('value')).removeAttr('value'); 
	  });
	}
}