javascript 单选框，多选框美化代码

Ilona ·

更新时间:2024-11-14

· 760 次阅读

crir = {
    init: function() {
        arrLabels = document.getElementsByTagName('label');
        searchLabels:
        for (var i=0; i<arrLabels.length; i++) {
            // get the input element based on the for attribute of the label tag
            if (arrLabels[i].getAttributeNode('for') && arrLabels[i].getAttributeNode('for').value != '') {
                labelElementFor = arrLabels[i].getAttributeNode('for').value;
                inputElement = document.getElementById(labelElementFor);
            }
            else {
                continue searchLabels;
            }
            inputElementClass = inputElement.className;
            // if the input is specified to be hidden intiate it
            if (inputElementClass == 'crirHiddenJS') {
                inputElement.className = 'crirHidden';
                inputElementType = inputElement.getAttributeNode('type').value;
                // add the appropriate event listener to the input element
                if (inputElementType == "checkbox") {
                    inputElement.onclick = crir.toggleCheckboxLabel;
                }
                else {
                    inputElement.onclick = crir.toggleRadioLabel;
                }
                // set the initial label state
                if (inputElement.checked) {
    ;                 if (inputElementType == 'checkbox') { arrLabels[i].className = 'checkbox_checked'}
                    else { arrLabels[i].className = 'radio_checked' }
                }
                else {
                    if (inputElementType == 'checkbox') { arrLabels[i].className = 'checkbox_unchecked'}
                    else { arrLabels[i].className = 'radio_unchecked' }
                }
            }
            else if (inputElement.nodeName != 'SELECT' && inputElement.getAttributeNode('type').value == 'radio') { // this so even if a radio is not hidden but belongs to a group of hidden radios it will still work.
                arrLabels[i].onclick = crir.toggleRadioLabel;
                inputElement.onclick = crir.toggleRadioLabel;
            }
        }
    },
    findLabel: function (inputElementID) {
        arrLabels = document.getElementsByTagName('label');
        searchLoop:
        for (var i=0; i<arrLabels.length; i++) {
            if (arrLabels[i].getAttributeNode('for') && arrLabels[i].getAttributeNode('for').value == inputElementID) {
                return arrLabels[i];
                break searchLoop;
            }
        }
    },
    toggleCheckboxLabel: function () {
        labelElement = crir.findLabel(this.getAttributeNode('id').value);
        if(labelElement.className == 'checkbox_checked') {
            labelElement.className = "checkbox_unchecked";
        }
    &nbs p;   else {
            labelElement.className = "checkbox_checked";
        }
    },
    toggleRadioLabel: function () {
        clickedLabelElement = crir.findLabel(this.getAttributeNode('id').value);
        clickedInputElement = this;
        clickedInputElementName = clickedInputElement.getAttributeNode('name').value;
        arrInputs = document.getElementsByTagName('input');
        // uncheck (label class) all radios in the same group
        for (var i=0; i<arrInputs.length; i++) {
            inputElementType = arrInputs[i].getAttributeNode('type').value;
            if (inputElementType == 'radio') {
                inputElementName = arrInputs[i].getAttributeNode('name').value;
                inputElementClass = arrInputs[i].className;
                // find radio buttons with the same 'name' as the one we've changed and have a class of chkHidden
                // and then set them to unchecked
                if (inputElementName == clickedInputElementName && inputElementClass == 'crirHidden') {
                    inputElementID = arrInputs[i].getAttributeNode('id').value;
                    labelElement = crir.findLabel(inputElementID);
                    labelElement.className = 'radio_unchecked';
                }
            }
        }
        // if the radio clicked is hidden set the label to checked
        if (clickedInputElement.className == 'crirHidden') {
            clickedLabelElement.className = 'radio_checked';
        }
    },
    addEvent: function(element, eventType, doFunction, useCapture){
        ; if (element.addEventListener)
        {
            element.addEventListener(eventType, doFunction, useCapture);
            return true;
        } else if (element.attachEvent) {
            var r = element.attachEvent('on' + eventType, doFunction);
            return r;
        } else {
            element['on' + eventType] = doFunction;
        }
    }
}
crir.addEvent(window, 'load', crir.init, false);
在线演示http://img.jb51.net/online/checkbox/sample.html
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