Numeric Field Validation using Javascript

Hi guys,

During development sometimes we may need to validate some input fields for numeric field. Below is the java script function that works with almost all browsers.

Use this code in your code and pass KeyPress() event as an argument to this function.

function NumericValidation(eventObj)
{
    var keycode;
    if(eventObj.keyCode)//For IE
        keycode = eventObj.keyCode;
    else if(eventObj.Which)
        keycode = eventObj.Which;  // For FireFox
    else
        keycode = eventObj.charCode; // Other Browser
 
    if (keycode!=8) //if the key is the backspace key
    {
        if (keycode<48||keycode>57) //if not a number
            return false; // disable key press
        else
            return true; // enable key press
     }        
 }

 

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