function doVC() {
var b_vc=document.getElementById("vc")
if (b_vc) {
document.getElementById("vc").value="DS421";
	}

b_vc=document.getElementById("vc2")
if (b_vc) {
document.getElementById("vc2").value="DS421";
	}

b_vc=document.getElementById("vc3")
if (b_vc) {
document.getElementById("vc3").value="DS421";
	}

}