关于使用php作为主要编码进行验证时的字母限制n javascript作为附加混合编码 [英] Regarding alphabet restriction in validating using php as main coding n javascript as additional mix coding

问题描述

如何限制字母键入n允许使用javascript键入数字

how to restrict alphabet from keying in n allowing numbers to be key in using javascript

推荐答案

是的，我尝试了一些编码，但没有成功
这是代码:

yes bro i tried some codings but it didnt work
this are the codes:

<script type = "text/javascript">

function IsNumeric(strString)
// check for valid numeric strings 
{
var strValidChars = "0123456789.-";
var strChar;
var blnResult = true;

if (strString.length == 0) return false;

// test strString consists of valid characters listed above
for (i = 0; i < strString.length && blnResult == true; i++)
{
strChar = strString.charAt(i);
if (strValidChars.indexOf(strChar) == -1)
{
blnResult = false;
}
}
return blnResult;
}
function validate()
{

if(document.frm.student_ID.value==""){
alert("Please enter ads fee");
document.frm.student_ID.focus();
return false;
}
if (IsNumeric(document.frm.student_ID.value) == false) 
{
alert("Enter Integer value!");
return false;
}
}

		                 
	               
	
</script>

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