function jump(targ,selObj,restore)
{
	eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
	if (restore) selObj.selectedIndex=0;
}

function go(url,target)
{
	if (target)
	{
		window.open(url,target);
	}
	else 
	{
		window.location.href=url;	
	}
}

function increase () {
    var step = window.document.getElementById ( 'amount_step' );
    
    if ( step.value == Number.NaN )
        step.value = 1;
        
    step.value ++;
}

function decrease () {
    var step = window.document.getElementById ( 'amount_step' );
    
    if ( step.value == Number.NaN )
        step.value = 1;
        
    step.value --;
    if ( step.value < 0 )
        step.value = 0;
}