我对 Javascript 比较陌生,所以我希望这是一个简单的错误。我构建了一个在表单的 onSubmit 上调用的通用表单验证函数。该函数循环遍历表单的所有子元素,查找某些类,并分析相应字段的内容。如果它发现某些缺失或错误,它会显示相应的错误消息 div 并返回 false,从而阻止表单提交到 php 页面。
它在 firefox 3.6.3 中运行良好,但在我测试过的所有其他浏览器(Safari 4.0.4、Chrome 4.1、IE8)中,它似乎忽略了 onSubmit 并直接跳转到 php 处理页面。
HTML 代码:
<form name='myForm' id='myForm' action='process_form.php' method='post' onSubmit="return validateRequired('myForm')">
<fieldset class="required radioset">
<label for='selection1'>
<input type='radio' name='selection' id='selection1' value='1'/>
Option 1
</label>
<label for='selection2'>
<input type='radio' name='selection' id='selection2' value='2'/>
Option 2
</label>
<label for='selection3'>
<input type='radio' name='selection' id='selection3' value='3'/>
Option 3
</label>
<label for='selection4'>
<input type='radio' name='selection' id='selection4' value='4'/>
Option 4
</label>
<div class='errorBox' style='visibility:hidden'>
Please make a selection
</div>
</fieldset>
<fieldset class="required checkset">
<label>
Choice 1
<input type='checkbox' name='choices' id='choice1' value='1'/>
</label>
<label>
Choice 2
<input type='checkbox' name='choices' id='choice2' value='2'/>
</label>
<label>
Choice 3
<input type='checkbox' name='choices' id='choice3' value='3'/>
</label>
<label>
Choice 4
<input type='checkbox' name='choices' id='choice4' value='4'/>
</label>
<div class='errorBox' style='visibility:hidden'>
Please choose at least one
</div>
</fieldset>
<fieldset class="required textfield" >
<label for='textinput1'>
Required Text:
<input type='text' name='textinput1' id='textinput1' size='40'/>
</label>
<div class='errorBox' style='visibility:hidden'>
Please enter some text
</div>
</fieldset>
<fieldset class="required email textfield">
<label for='email'>
Required Email:
<input type='text' name='email' id='email' size='40'/>
</label>
<div class='errorBox' style='visibility:hidden'>
The email address you have entered is invalid
</div>
</fieldset>
<div>
<input type='submit' value='submit'>
<input type='reset' value='reset'>
</div>
</form>
JAVASCRIPT代码:
function validateRequired(id){
var form = document.getElementById(id);
var errors = 0;
var returnVal = true;
for(i = 0; i < form.elements.length; i++){
var elem = form.elements[i];
if(hasClass(elem,"required")){
/*RADIO BUTTON or CHECK BOX SET*/
if(hasClass(elem,"radioset") || hasClass(elem,"checkset")){
var inputs = elem.getElementsByTagName("input");
var check = false;
for(j = 0; j < inputs.length; j++){
if(inputs[j].checked){
check = true;
}
}
if(check == false){
errors += 1;
showError(elem);
} else {
hideError(elem);
}
}
/*TEXT FIELD*/
else if(hasClass(elem,"textfield")){
var input = elem.getElementsByTagName("input");
if(input[0].value == ""){
errors += 1;
showError(elem);
} else {
hideError(elem);
/*EMAIL ADDRESS*/
if(hasClass(elem,"email")){
if(isValidEmail(input[0].value) == false){
errors += 1;
showError(elem);
} else {
hideError(elem);
}
}
}
}
}
}
if(errors > 0){
returnVal = false;
} else {
returnVal = true;
}
return returnVal;}
我知道这是很多代码要看,但任何帮助将不胜感激。由于它在一个浏览器中运行良好,我不确定如何开始调试。谢谢安德鲁