Regex problem (form validation)

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November 16th, 2012, 07:24 PM

atta_akbar

Registered User

Join Date: Nov 2012

Posts: 9

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Other - Regex problem

Hello brothers, how are you all??
i am writing regex of two fields, i want my code to be more reducible. can i write them in one if condition. Or if there is any other way?

Code:

function fstnreg() 
<input type="text" id="fname" size="22" value="First" onKeyPress="fstnreg();" onFocus="fnfocus();" onBlur="fnblur();"/>	
					<input type="text" id="lname" size="22" value="Last" onKeyPress="lstnreg();"/>


{ 	var fstname=document.getElementById('fname').value; 	var lstname=document.getElementById('lname').value; 	var frg=/^([a-zA-Z])/; 	if(!fstname.match(frg)||!lstname.match(lrg)) 	{ 		document.getElementById('fnvali').innerHTML='Invalid name'; 		document.getElementById('fnvali').style.Color='red'; 	}  }

November 16th, 2012, 07:25 PM

atta_akbar

Registered User

Join Date: Nov 2012

Posts: 9

Time spent in forums: 2 h 41 m 28 sec
Reputation Power: 0

Regex problem

Hello brothers, how are you all??
i am writing regex of two fields, i want my code to be more reducible. can i write them in one if condition. Or if there is any other way?

Code:

 
<input type="text" id="fname" size="22" value="First" onKeyPress="fstnreg();" onFocus="fnfocus();" onBlur="fnblur();"/>	
<input type="text" id="lname" size="22" value="Last" onKeyPress="lstnreg();"/>

function fstnreg()
{ 	
var fstname=document.getElementById('fname').value; 	
var lstname=document.getElementById('lname').value; 	
var frg=/^([a-zA-Z])/; 	if(!fstname.match(frg)||!lstname.match(lrg)) 	
{ 
document.getElementById('fnvali').innerHTML='Invalidname'; 		
document.getElementById('fnvali').style.Color='red'; 
	}
  }

November 16th, 2012, 07:55 PM

Jacques1

pollyanna

Join Date: Jul 2012

Location: Germany

Posts: 2,033

Time spent in forums: 1 Month 2 Weeks 6 Days 19 h 59 m 18 sec
Reputation Power: 812

Hi,

um, don't you already have the two checks in one "if" statement?

But I think the problem is that your functions are far too specific. Writing a function for "blur the element #fname" makes no sense. Define a general function blur() and refer to the current element via "this".

November 17th, 2012, 06:43 AM

atta_akbar

Registered User

Join Date: Nov 2012

Posts: 9

Time spent in forums: 2 h 41 m 28 sec
Reputation Power: 0

Regex Problem.

Thanks buddy.but unfortunately the thing that i know about 'this' keyword after searching a lot is "when we use this keyword in a function and call that function on any event in an <input> tag then 'this' keyword points toward that <input> tag".
So please tell me how to use it briefly.

Quote:

Originally Posted by Jacques1

Other - Regex problem (form validation)

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