onClick validate checkboxes

**oneofthelions** · 07-09-2010 10:37 AM

Hi, I have number of checkboxes and another checkbox for "Select All"

I want to check if the user has selected at least one checkbox. Need modification in javascript

Code:

<head>

<!--script to check, unckeck all boxes-->
<script type="text/javascript">
checked=false;
function All (holiDay) {
	var all= document.getElementById('holiDay');
	 if (checked == false)
          {
           checked = true
          }
        else
          {
          checked = false
          }
	for (var i =0; i < all.elements.length; i++) 
	{
	 all.elements[i].checked = checked;
	}
      }
</script>

<!--script to check at least one checkbox selected-->
<script>
function Validate(){
var all=document.getElementById('holiDay');
for(var i=0;i<all.elements.length;i++){ 
if(all.elements[i].checked)return true; 
}
alert("Please identify what warehouses comply:");  
return false; 
}
</script> 
</head>

<body>
<form name="holiDay"....
....
[]select All

1. <input type="checkbox"....
2. ....
3. ....

</body>

...

**Webnerd** · 07-09-2010 10:44 AM

For starters, your checkboxes can't all have the same ID. They can have the same name attribute but not ID

**oneofthelions** · 07-09-2010 01:28 PM

They are variable ID's, in a logic:iterate of JSP. They should work I assume since the logic iterate will loop into it?

**oneofthelions** · 07-09-2010 02:13 PM

I included the script within the function which is called when the button is clicked.

its not working either

Code:

<script language="Javascript">
         
function doSubmit(){
	function check_checkboxes() 
	{ 
	checked=false;
	var c = document.getElementsByTagName('INPUT'); 
	for (var i = 1; i < c.length; i++) 
	{ 
    	if (c[i].type == 'checkbox') 
    	{ 
      	if (c[i].checked) {
       	return true} 
    	else {alert("Please identify what warehouses comply:");  }
    		} 
  		} 
	}	 
	document.holiDay.command.value= 'addingApp';
	document.holiDay.submit(); 
}

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