function setupRemoveDefault() {

var els = document.getElementsByTagName("input");
for(var i=0,j=els.length; i<j; i++) {
els[i].onclick = function () {removeDefault(this);}
}
   
}

function removeDefault(el) {
if((!el.rel || el.value == el.rel) && (el.type == "text" || el.type == "")) {     el.rel = el.value;
el.value = '';
var elName = el.id;
el.onblur = function () { if(!el.value) {addDefault(elName);}}
return true;
}
}

function addDefault(elName) {
var el = document.getElementById(elName);
el.value = el.rel;
}