function switch_image(id_unvis,id_vis){
	document.getElementById(id_unvis).style.display = 'none';
	document.getElementById(id_vis).style.display = 'block'; 
}

function numbersonly(e){
var unicode=e.charCode? e.charCode : e.keyCode
if (unicode!=9 && unicode!=8){ //if the key isn't the backspace key (which we should allow)
if (unicode<48||unicode>57) //if not a number
return false //disable key press
}
}

function enableDeliveryAddressFields(inEnableFlag)
{
	var vFields = ['client_liv_societe','client_liv_adresse','client_liv_adresse2','client_liv_cp','client_liv_ville'];
	for (var i = 0; i < vFields.length; i++)
	{
		var element = document.getElementById(vFields[i]);
    	element.disabled = ! inEnableFlag;
		if (inEnableFlag == false)
			element.value = '';
    }
}

function enableDeliveryAddressFieldsAna(inEnableFlag)
{
	var vFields = ['ana_liv_societe','ana_liv_adresse','ana_liv_adresse2','ana_liv_cp','ana_liv_ville'];
	for (var i = 0; i < vFields.length; i++)
	{
		var element = document.getElementById(vFields[i]);
    	element.disabled = ! inEnableFlag;
		if (inEnableFlag == false)
			element.value = '';
    }
}