width value as a varable

[vishalmarya]

i need to set the value to a width element of the style attribute of button control.

Like :

<input type="submit" name="btn1" value="Button" id="btn1" style="width:100px;" />

But how can i provide the value as a variable instead of hardcoded one. i don't want to achieve this through separate javascript statement.

 

[tsuji]

[1]
[tt]var elem=document.getElementById("btn1");
//the right-hand-size can be fed through a variable, sure, as requested
elem.style.width=123+"px"; //some number + unit of measure[/tt]

[2] As an application of the idea, if you want to double the width, it is like this. There is an elaboration in it which is for the purpose of preserving the original unit of measure.
[tt]
var elem=document.getElementById("btn1");
var w=elem.style.width;
elem.style.width=2*parseFloat(w)+w.replace(/[\d.,]/g,"");[/tt]