var currentActiveTab = 'tab1';

function openclosetab(activeTab)
{
    if (activeTab == currentActiveTab) {
        return;
    }
    var inactiveTab1 = currentActiveTab;
     
	document.getElementById(activeTab).style.height = "auto";
	document.getElementById(inactiveTab1).style.height = "1px";
	
	document.getElementById(activeTab + "_div").className = "current";
	document.getElementById(inactiveTab1 + "_div").className = "currentoff";
	
	currentActiveTab = activeTab;
}