JS 清除表单内容

<script type="text/javascript">function clearForm(form){    var formObj = document.getElementsByName(form)[0];    if(formObj == undefined)    {        return;    }        for(var i=0; i<formObj.elements.length; i++)    {        if(formObj.elements[i].type == "text")        {            formObj.elements[i].value = "";        }        else if(formObj.elements[i].type == "password")        {            formObj.elements[i].value = "";        }        else if(formObj.elements[i].type == "radio")        {            formObj.elements[i].checked = false;        }        else if(formObj.elements[i].type == "checkbox")        {            formObj.elements[i].checked = false;        }        else if(formObj.elements[i].type == "select-one")        {            formObj.elements[i].options[0].selected = true;        }        else if(formObj.elements[i].type == "select-multiple")        {                for(var j = 0; j < formObj.elements[i].options.length; j++)            {                formObj.elements[i].options[j].selected = false;            }        }        else if(formObj.elements[i].type == "file")        {            //formObj.elements[i].select();            //document.selection.clear();                         // for IE, Opera, Safari, Chrome            var file = formObj.elements[i];             if (file.outerHTML) {                 file.outerHTML = file.outerHTML;             } else {                 file.value = "";  // FF(包括3.5)            }        }        else if(formObj.elements[i].type == "textarea")        {            formObj.elements[i].value = "";        }    }    }</script

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