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Thread: Validate code with javascript

  1. #1
    Join Date
    Sep 2012
    Posts
    6

    Validate code with javascript

    Hi i have created a code to validate my script but i cant figure out how to make the hphone and fax numeric and "10" digits any suggestions pls
    HTML Code:
    function validate_form ()
    {
    	valid = true;
    
            if ( document.input.name.value == "" )
            {
                    alert ( "Please enter your name" );
                    valid = false;
            }
    				
    				if ( document.input.address.value == "" )
            {
                    alert ( "Please enter your address address" );
                    valid = false;
            }
    		
    				if ( document.input.town.value == "" )
            {
                    alert ( "Please enter your Suburb or town" );
                    valid = false;
            }
      				if ( document.input.postcode.value == "" )
            {
                    alert ( "Please enter your postocde" );
                    valid = false;
            }
    				
    				if ( document.input.hphone.value == "" )
            {
                    alert ( "Please enter your home phone number" );
                    valid = false;				
    		}		
    				if ( document.input.wphone.value == "" )
            {
                    alert ( "Please enter your work phone number" );
                    valid = false;
            }
            		if ( document.input.fax.value == "" )
            {
                    alert ( "Please enter your fax" );
                    valid = false;
            }
            
            	if ( document.input.daydropdown.value == "" )
            {
                    alert ( "Please enter day for delivery" );
                    valid = false;
            }
    		
    				if ( document.input.monthdropdown.value == "" )
            {
                    alert ( "Please enter month for delivery" );
                    valid = false;
            }
            		if ( document.input.yeardropdown.value == "" )
            {
                    alert ( "Please enter year of delivery" );
                    valid = false;
            }
            {
     var x=document.forms["input"]["email"].value;
     var atpos=x.indexOf("@");
     var dotpos=x.lastIndexOf(".");
     if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
       {
       alert("Not a valid e-mail address");
       return false;
       }
    	}
            return valid;
    }
    function setVisible(id, visible) {
            var o = document.getElementById(id);
            if (typeof(o) != 'undefined') o.style.visibility = visible ? 'visible' : 'hidden';
            if (typeof(o) == 'undefined') alert("Element with id '" + id + "' not found.");
        }
    
        function setDisplay(id, visible) {
            var o = document.getElementById(id);
            if (typeof(o) != 'undefined') o.style.display = visible ? 'block' : 'none';
            if (typeof(o) == 'undefined') alert("Element with id '" + id + "' not found.");
        }

  2. #2
    Join Date
    Aug 2008
    Location
    Sweden
    Posts
    227
    All input values are strings, so you can easily check the 'length' attribute to see how long the strings are.

    Code:
    if (document.input.hphone.value.length != 10) { alert("Invalid home phone number"); }

  3. #3
    Join Date
    Jul 2007
    Posts
    386
    refreezed has your solution.

    I am here just to recommend that you use some existing validation library with all that functionality. jQuery Validate is a good and flexible one. If someone else can recommend others, then do so please.

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