接受一个form对象
function resetFields(whichform) {
if (Modernizr.input.placeholder) return;
for (var i=0;i<whichform.elements.length;i++) {
var element = whichform.elements[i];
if (element.type == "submit") continue;
var check = element.placeholder || element.getAttribute('placeholder');
if (!check) continue;
element.onfocus = function () {
var text = this.placeholder || this.getAttribute('placeholder');
if (this.value == text) {
this.className = '';
this.value = "";
}
}
element.onblur = function () {
if (this.value == "") {
this.className = 'placeholder';
this.value = this.placeholder || this.getAttribute('placeholder');
}
}
element.onblur();
}
}
可通过遍历传入所有form对象
function prepareForms() {
for (var i=0;i<document.forms.length;i++) {
var thisform = document.forms[i];
resetFields(thisform);
}
}
