function replaceCrLf(elementId){
//alert("champ avant="+document.getElementById(elementId).value);
var str = document.getElementById(elementId).value
document.getElementById(elementId).value = str.replace(/[\n\r]/g, "_@_");
//alert("champ="+document.getElementById(elementId).value);
}

function rollbackCrLf(elementId){
var str = document.getElementById(elementId).value
document.getElementById(elementId).value = str.replace(/_@_/g, "\r\n");
//alert("champ redo="+document.getElementById(elementId).value);
}