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rashu
validation in java script
1 Answer(s)      2 years and a month ago
Posted in : Java Beginners


i have put this code for only entering integer value in text box however error occured.. if(document.formname.textbox1.value!=="") { var rn,i;

rn=document.formname.textbox1.value; for(i=0i='0' && rn.charAt(i)<='9') { } else { alert("code must be an integer"); return false; } this is not working properly pls help


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July 26, 2012 at 4:47 PM


Here is a javascript code that validate s the number.

<html>
<script>

function validate(){

     if(document.form.num.value == ""){
        alert("Please enter number!" );
        document.form.num.focus();
        return false;
     }
        var con=document.form.num.value;
        var ex = new RegExp(/^\d+$/);
        var t=ex.test(con);
        if(!t){
        alert("Enter only Number .");
        document.form.num.focus();
        return false;
      }
   }  
</script>
<form name="form" method="post" onsubmit="return validate();">
<pre>
 Enter Number: <input type="text" name="num">
               <input type="submit" value="Check">
</pre>
</form>
</html>


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