document.getElementById("spectra_left_Y1").innerHTML += ""
document.getElementById("spectra_left_X1").innerHTML += ""
document.getElementById("spectra_right_Y1").innerHTML += ""
document.getElementById("spectra_right_X1").innerHTML += ""
document.getElementById("spectra_left_Y2").innerHTML += ""
document.getElementById("spectra_left_X2").innerHTML += ""
document.getElementById("spectra_right_Y2").innerHTML += ""
document.getElementById("spectra_right_X2").innerHTML += ""
document.getElementById("spectra_left_Y3").innerHTML += ""
document.getElementById("spectra_left_X3").innerHTML += ""
document.getElementById("spectra_right_Y3").innerHTML += ""
document.getElementById("spectra_right_X3").innerHTML += ""