Why can I add value of two variable?

[kukix]

Hello...
I have small problem..

I dont know how to add value of two variables.

<INPUT type=hidden value=3 name=poleForma1 id=poleForma1>
<INPUT type=button value=GO onClick="JavaScript: calculateValue(document.getElementById('poleForma1').value )">

and that function:

function calculateValue(valueee) { 
document.getElementById('poleForma1').value = eval(valueee+1); 
}

When value of input poleForma1 is 3, than function calculateValue return 31, but not 4...
What do I do bad...?

Please help me...

 

[kaht]

function calculateValue(valueee) {
document.getElementById('poleForma1').value = [!]parseInt(valueee, 10)[/!] + 1;
}

and here's some info:

http://www.w3schools.com/jsref/jsref_parseInt.asp

-kaht

[small]How spicy would you like your chang sauce? Oh man... I have no idea what's goin' on right now...[/small]

 

[kukix]

thanks for help...

P.S. I'am from Poland in Europe... and i coudn't find answer on my question... thx...

 

[kaht]

Glad I could help - welcome to tek-tips

-kaht

[small]How spicy would you like your chang sauce? Oh man... I have no idea what's goin' on right now...[/small]