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style.filter percentage to hex?

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May 27.2011

I’m working with a style.filter related function.

Some of my function appear as …

[CODE]document.getElementById(‘audio’).style.filter = ‘progid:DXImageTransform.Microsoft.gradient(startColorstr=#A8’ + c.substring(1) + ‘,endColorstr=#A8’ + c.substring(1) + ‘)’;[/CODE]

Everything is working but I’m trying to replace the “A8” part with a percentage typed in by the viewer.

The percentage is simply a non-decimal number between 0 and 100 typed into a box.

I know how to grab the value of the box (again, it’s 0-100) but how do I convert that number into it’s “A8” equivalent?

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JavaScript

3 Comments(s) ↴

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@mrhooMay 27.2011 — [CODE]function hexpercent(pct){
var hex= (Math.round(parseFloat(pct)*2.55)).toString(16);
if(hex.length== 1) hex= '0'+hex;
return hex;
}[/CODE]

hexpercent('100%')

/* returned value: (String)

ff

*/
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@rnd_meMay 27.2011 — [CODE]var myNum=75;

var myHex= ("0000"+(Math.floor( (myNum /100) * 255 )).toString(16)).slice(-2);

alert(myHex)[/CODE]
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@robindeanauthorMay 27.2011 — Both work quite nicely. Thanks!
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