Question

I have a problem, with disabling a input button with javascript in a aspx document at ie.

The js look’s like

<script language="javascript" type="text/javascript">
function SetButtonStatus(sender, target) 
{
    if (searchinput.value.length < 4) 
    {
        document.getElementById(target).disabled = true;
    }
    else 
    {
        document.getElementById(target).disabled = false;
    }
}
</script>

I call the input button with

<input name="searchinput" type="text" value="" id="searchinput" onkeyup="SetButtonStatus(this, 'searchsubmit')" />

In Chrome everything works fine. If i type more then 4 characters in the inputfield, the button will be enabled. But in IE & FF nothing happens… Why? How could i fix this?

Answer 1

You are depending on the non-standard “Create a global variable for every element that has an id” that is supported by Chrome and IE in some rendering modes.

Replace searchinput with sender (since you have defined sender and passed a reference to the element you are interested in already).