How can we get number of textboxes in a form using javascript?

开发者_StackOverflow中文版How can we get number of textboxes in a form using javascript? Thanks in advance.

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var inputs = document.getElementsByTagName('input');
var count = 0;
for(var cpt = 0; cpt < inputs.length; cpt++)
if (inputs[cpt].type == 'text') count++;
alert(count);

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var node_list = document.getElementsByTagName('input');
var c=0;
for (var i = 0; i < node_list.length; i++) {
    var node = node_list[i];

     if (node.getAttribute('type') == 'text') {
        c++;
     }
 } 
alert(c);

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This will be faster:

Array.prototype.slice.apply(document.getElementsByTagName('input')).length;

But it won't separate input types. If you have to do that, create the array like I did above then loop through the array and select members that are the right type, then check length on the resulting array.

(function () {
    var arr = Array.prototype.slice.apply(document.getElementsByTagName('input')),
    i = arr.length, item, textOnlyArray = [];
    while (i--) {
        item = arr[i];
        if (item.hasOwnProperty("type") && item.type === "text") {
            textOnlyArray.push(item);
        }
    }
    return textOnlyArray;
}());

You can also use Array.forEach if you don't need to support old/junky browsers. That's even faster than while(i--)