/************************************************************************/
/*WEBATY.COM*/
/*Rainbow ID*/
/************************************************************************/


var webaty_rate = 20;  // Increase amount(The degree of the transmutation)


////////////////////////////////////////////////////////////////////
// Main settings

if (document.getElementById)
window.onerror=new Function("return true")

var webaty_elmH = 0;   // Hue
var webaty_elmS = 128; // Saturation
var webaty_elmV = 255; // Value
var webaty_TimerID;    // Timer ID




//=============================================================================
// Webaty_doRainbow
//  This function begins to change a color.
//=============================================================================
function Webaty_doRainbow(ID)
{
        webaty_TimerID = setInterval("Webaty_ChangeColor('"+ID+"')",100);
}

//=============================================================================
// Webaty_ChangeColor
//  This function changes a color actually.
//=============================================================================
function Webaty_ChangeColor(ID)
{
    document.getElementById(ID).style.color = Webaty_makeColor();
}




//=============================================================================
// Webaty_makeColor
//  This function makes rainbow colors.
//=============================================================================
function Webaty_makeColor()
{
    // Don't you think Color Gamut to look like Rainbow?

    // HSVtoRGB
    if (webaty_elmS == 0) {
        elmR = webaty_elmV;    elmG = webaty_elmV;    elmB = webaty_elmV;
    }
    else {
        t1 = webaty_elmV;
        t2 = (255 - webaty_elmS) * webaty_elmV / 255;
        t3 = webaty_elmH % 60;
        t3 = (t1 - t2) * t3 / 60;

        if (webaty_elmH < 60) {
            elmR = t1;  elmB = t2;  elmG = t2 + t3;
        }
        else if (webaty_elmH < 120) {
            elmG = t1;  elmB = t2;  elmR = t1 - t3;
        }
        else if (webaty_elmH < 180) {
            elmG = t1;  elmR = t2;  elmB = t2 + t3;
        }
        else if (webaty_elmH < 240) {
            elmB = t1;  elmR = t2;  elmG = t1 - t3;
        }
        else if (webaty_elmH < 300) {
            elmB = t1;  elmG = t2;  elmR = t2 + t3;
        }
        else if (webaty_elmH < 360) {
            elmR = t1;  elmG = t2;  elmB = t1 - t3;
        }
        else {
            elmR = 0;   elmG = 0;   elmB = 0;
        }
    }

    elmR = Math.floor(elmR).toString(16);
    elmG = Math.floor(elmG).toString(16);
    elmB = Math.floor(elmB).toString(16);
    if (elmR.length == 1)    elmR = "0" + elmR;
    if (elmG.length == 1)    elmG = "0" + elmG;
    if (elmB.length == 1)    elmB = "0" + elmB;

    webaty_elmH = webaty_elmH + webaty_rate;
    if (webaty_elmH >= 360)
        webaty_elmH = 0;

    return '#' + elmR + elmG + elmB;
}