/** 
  */

var knownDivs = new Array();

function registerDiv(pc_div) {
    knownDivs[this.knownDivs.length] = pc_div;
}
function showdiv(pc_div) {
    newval = "none";
    for ( i = 0; i < this.knownDivs.length; i++ ) {
        document.getElementById(knownDivs[i]).style.display = newval;
    }
    
    newval = "block";
	document.getElementById(pc_div).style.display = newval;
}