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JS实现点击复选框将按钮或文本框变为灰色不可用的方法_javascript技巧

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Release： 2016-05-16 15:45:54
Original
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本文实例讲述了JS实现点击复选框将按钮或文本框变为灰色不可用的方法。分享给大家供大家参考。具体如下：

在注册时候经常会看不到，如果不点击阅读注册许可的话，提交按钮是灰色的，失效不能提交，必须点它一下，这个JS代码就是实现这样一个功能，只有你点击了确认提交，下边的按钮才生效。

运行效果如下图所示：

具体代码如下：

<html>
<head>
<title>点击复选框按钮变为不可用</title>
</head>
<script>
var checkobj
function agreesubmit(el){
checkobj=el
if (document.all||document.getElementById){
for (i=0;i<checkobj.form.length;i++){ 
var tempobj=checkobj.form.elements[i]
if(tempobj.type.toLowerCase()=="submit")
tempobj.disabled=!checkobj.checked
}
}
}
function defaultagree(el){
if (!document.all && !document.getElementById){
if (window.checkobj && checkobj.checked)
return true
else{
alert("Please read/accept terms to submit form")
return false
}
}
}
</script>
<body>
<form name="agreeform" onSubmit="return defaultagree(this)">
<input name="agreecheck" type="checkbox" onClick="agreesubmit(this)"><b>你确认要提交？</b><br>
<input type="Submit" value="我一定要提交" disabled>
</form>
<script>
document.forms.agreeform.agreecheck.checked=false
</script>
</body>
</html>
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希望本文所述对大家的javascript程序设计有所帮助。

Related labels：
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