How to validate multiple textbox value at a time using javascript?

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Please Numbers Only:

I have four textbox within a form, I want to validate each of four textbox at a single button click. How I will do it, could anybody help me out for the same.

I have the code which has validated only one textbox value. Below is the code -

XML

<html>
<body>
<script type='text/javascript'>
function onlynumbers(element, AlertMessage)
{
 var regexp =  /^[-+]?[0-9]+$/;
if(element.value.match(regexp)) {
alert("Numbers Validation: Successful.");
return true;
}
else{
alert(AlertMessage);
element.focus();
return false;
}
}

</script>
<form>
Please Numbers Only:
<input type='text' id='txtnumbers'/>
Please Numbers Only:
<input type='text' id='txtnumbers'/>
Please Numbers Only:
<input type='text' id='txtnumbers'/>
Please Numbers Only:
<input type='text' id='txtnumbers'/>
<input type='button' onclick="onlynumbers(document.getElementById('txtnumbers'), 'Please Enter Numbers only.')" value='Validate Numbers'/>
</form>
</body>
</html>

Posted 2-Sep-15 7:19am

Bittu14

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Manas_Kumar · Accepted Answer · 2015-09-02T07:39:00

Javascript Code:

JavaScript

function onlynumbers(AlertMessage)
{
	var regexp =  /^[-+]?[0-9]+$/;
	var element;
        var counter = 0;
        var counter2 = 0;

	for (var i = 0; i < document.forms[0].elements.length; i++)
	{
		element = document.forms[0].elements[i];
		// For textbox only
		if(element.type == 'text')
		{
                        counter2 +=1;
			if(element.value.match(regexp)) {
				counter +=1;
			}
			else{
				alert(AlertMessage);
				element.focus();
				return false;
			}
		}
	}
        // Checking all textboxes are validated..
        if(counter == counter2)
        {
           alert("Numbers Validation: Successful.");
           return true;
        }
}

HTML Code:

HTML

<input type='button' onclick="onlynumbers('Please Enter Numbers only.')" value='Validate Numbers'/>