Javascript to convert the reverse color value

Here is the small javascript code i wrote to get the reverse color for text on the colored background.

< script type="text/javascript">
function changeColor(colorval){
var colorValue='';
var reverseColor='';
if(colorval.length==4 || colorval.length==7 ){
colorval=colorval.substr(1,colorval.length);
}
if (colorval.length==3){
for(i=0;i<colorval.length;i++){
var colchar=colorval.substr(i,1);
colorValue+=colchar+colchar;
reverseColor+=reverseColorChar(colchar)+reverseColorChar(colchar);
}
}else{
for(j=0;j<colorval.length;j++){
var colchar=colorval.substr(j,1);
reverseColor += reverseColorChar(colchar);
}
colorValue=colorval;
}


document.getElementById('abc').style.background='#'+colorValue;
document.getElementById('abc_text').style.color='#'+reverseColor;
alert(reverseColor);
}

function reverseColorChar(colorChar){
var reverseColorCode=0;
if(colorChar=='0')
reverseColorCode='f';
else if(colorChar=='1')
reverseColorCode='e';
else if(colorChar=='2')
reverseColorCode='d';
else if(colorChar=='3')
reverseColorCode='c';
else if(colorChar=='4')
reverseColorCode='b';
else if(colorChar=='5')
reverseColorCode='a';
else if(colorChar=='6')
reverseColorCode='9';
else if(colorChar=='7')
reverseColorCode='8';
else if(colorChar=='8')
reverseColorCode='7';
else if(colorChar=='9')
reverseColorCode='6';
else if(colorChar=='a')
reverseColorCode='5';
else if(colorChar=='b')
reverseColorCode='4';
else if(colorChar=='c')
reverseColorCode='3';
else if(colorChar=='d')
reverseColorCode='2';
else if(colorChar=='e')
reverseColorCode='1';
else if(colorChar=='f')
reverseColorCode='0';
return reverseColorCode;
}


< /script>

< input type="text" id="colorValue" name="colorValue" value="">
< input type="button" value="change color" onclick="javascript:changeColor(document.getElementById('colorValue').value)">
< div id="abc" style="width:100px;height:100px;border:1px #333 solid;">
< span id="abc_text">here is the text< /div>

Another milestone is Music Sharing

Dekoh released the beta version of the music application (http://www.dekoh.com/music/index.html) which allows you to organize your music-and stream it to your friends. It makes it convenient for all the music lovers out there to share music from their desktop.
What strikes me most is that once i have imported the music i can access it from any mobile device which is connected through internet. Its like having your own radio station. My friends can listen the music from my desktop anytime.... anywhere which i have shared for them. However the internet speed is the only bottleneck at this point of time but on my 128kbps broadband connection it works decently well.